after

applicationIds

count

entityId

opinionAndColumnArticleTypeIds

sponsorArticleQueueName

superTopicQueueName

topicPageQuery

filter

topic

types

advertZone

sponsor

topicContentListTopic

topicTopicPageTopic

topicContentListOpinion

topicHeaderTopic

topicSeoTopic

topicContentListTopicSuperTopicQueueQuery

topicSponsorArticlesQueueQuery

queue

query topicPageQuery(
  $entityId: String!
  $superTopicQueueName: String!
  $sponsorArticleQueueName: String!
  $applicationIds: [String]
  $opinionAndColumnArticleTypeIds: [String]
  $after: String
  $count: Int = 30
) {
  topic(filter: {entityId: $entityId}) {
    entityId
    types
    advertZone
    sponsor {
      __typename
      id
    }
    ...topicContentListTopic_3In6IJ
    ...topicTopicPageTopic_3In6IJ
    ...topicContentListOpinion_cgYJP
    ...topicHeaderTopic
    ...topicSeoTopic
    id
  }
  ...topicContentListTopicSuperTopicQueueQuery_1LY7E3
  ...topicSponsorArticlesQueueQuery_3wOIuE
}

fragment articleCommentArticle on Article {
  ...entityLink
  commentCount
  entityId
}

fragment authorAvatarAuthor on Author {
  ...entityLink
  entityId
  name
  types
  image(filter: {type: AUTHOR_IMAGE}) {
    style(filter: {style: "118x118"}) {
      url
    }
  }
}

fragment authorNameAuthor on Author {
  ...entityLink
  name
}

fragment blockquoteQuoteContent on Content {
  __isContent: __typename
  ...contentShareWidgetContent
}

fragment cardContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment checkersCheckContentContainsStarlingImageContent on Content {
  __isContent: __typename
  topics {
    entityId
    id
  }
}

fragment contentActionBarContent on Content {
  __isContent: __typename
  entityId
  createdDate
  updatedDate
  publishedDate
  urlAlias
  ...articleCommentArticle
  ... on Article {
    hasVideoContent
  }
}

fragment contentAuthorLinkContent on Content {
  __isContent: __typename
  authors {
    name
    ...entityLink
    id
  }
  ...hooksContentHelperContent
}

fragment contentCoverImageContent on Content {
  __isContent: __typename
  images {
    url
    title
    type
    size1200x800: style(filter: {style: "1200x800"}) {
      url
    }
    size1200x1200: style(filter: {style: "1200x1200"}) {
      url
    }
    size1280x720: style(filter: {style: "wide_landscape"}) {
      url
    }
    size768x768: style(filter: {style: "768x768"}) {
      url
    }
    size540x360: style(filter: {style: "540x360"}) {
      url
    }
    size320x240: style(filter: {style: "320x240"}) {
      url
    }
    size80x80: style(filter: {style: "80x80"}) {
      url
    }
    size500x500: style(filter: {style: "500x500"}) {
      url
    }
    size800x1200: style(filter: {style: "portrait"}) {
      url
    }
  }
}

fragment contentCoverVideoContent on Content {
  __isContent: __typename
  ... on Article {
    multimediaEmbed {
      json
    }
    ...contentSchemaRenderContent
  }
}

fragment contentHeadlineContent on Content {
  __isContent: __typename
  headline
  socialHeadline
  ...contentHeadlineTagContent
}

fragment contentHeadlineTagContent on Content {
  __isContent: __typename
  ...hooksContentHeadlineTagContent
}

fragment contentItemRenderContent on Content {
  __isContent: __typename
  ...entityLink
  ...contentCoverImageContent
  ...contentActionBarContent
  ...contentCoverVideoContent
  ...contentPublishedDateContent
  ...contentSubHeadlineContent
  ...contentSummaryContent
  ...contentHeadlineContent
  ...contentPrintHeadlineContent
  ...contentTopicLinkContent
  ...contentLiveTagContent
  ...contentAuthorLinkContent
  ...primaryContentItemContent
  ...secondaryContentItemContent
  ...searchContentItemContent
  ...opinionContentItemContent
  ...cardContentItemContent
  ...morningStudioContentItemContent
  ...magazinesStyleLeadContentItemContent
  ...magazinesStyleCardContentItemContent
  ...magazinesStyleArticleMoreOnThisContentItemContent
  ...hooksUseContentSponsorContent
  ...postiesPrimaryContentItemContent
  ...postiesSecondaryContentItemContent
  ...postiesSectionPrimaryContentItemContent
  ...postiesSectionSecondaryContentItemContent
  ... on Video {
    __typename
    ...videoDurationOverlayVideo
  }
  ...magazinesStyleFashionCarouselContentItemContent
  ...magazinesStyleSpotlightContentItemContent
}

fragment contentLiveTagContent on Content {
  __isContent: __typename
  ... on Article {
    flattenTypeIds
    tmpLiveArticle {
      status
      id
    }
  }
}

fragment contentNewsletterWidgetContent on Content {
  __isContent: __typename
  topics {
    relatedNewsletters {
      ...helpersMassageToNewsletterItemNewsletter
      id
    }
    id
  }
  sections {
    value {
      relatedNewsletters {
        ...helpersMassageToNewsletterItemNewsletter
        id
      }
      id
    }
  }
  ... on Article {
    relatedNewsletters {
      ...helpersMassageToNewsletterItemNewsletter
      id
    }
  }
}

fragment contentPrintHeadlineContent on Content {
  __isContent: __typename
  printHeadline
}

fragment contentPublishedDateContent on Content {
  __isContent: __typename
  publishedDate
}

fragment contentSchemaRenderContent on Content {
  __isContent: __typename
  ...blockquoteQuoteContent
  ...imageContent
  ...inlineWidgetContent
  ...photoGalleryWidgetContent
  ...scmpYoutubeContent
}

fragment contentShareWidgetContent on Content {
  __isContent: __typename
  entityId
  urlAlias
  shortUrl
  socialHeadline
  headline
}

fragment contentSubHeadlineContent on Content {
  __isContent: __typename
  subHeadline {
    json
  }
  summary {
    json
  }
  ...contentSchemaRenderContent
}

fragment contentSummaryContent on Content {
  __isContent: __typename
  summary {
    text
  }
  ...contentSchemaRenderContent
}

fragment contentTopicLinkContent on Content {
  __isContent: __typename
  topics {
    urlAlias
    ...entityLink
    ...topicLinkTopic
    id
  }
}

fragment contentTopicLinkSuperTopic on Topic {
  ...topicCheckSuperTopic
  urlAlias
  relatedLink {
    url
  }
}

fragment entityFollowButtonBase on Base {
  __isBase: __typename
  __typename
  ... on Section {
    entityId
    name
  }
  ... on Author {
    entityId
    name
    disableFollow
  }
  ... on Topic {
    entityId
    name
    disableFollow
  }
}

fragment entityLink on Base {
  __isBase: __typename
  __typename
  entityId
  entityUuid
  urlAlias
  urlRedirect {
    toUrl
    id
  }
  application {
    entityId
    id
  }
  ... on Section {
    fullSectionPath {
      entityId
      id
    }
  }
  ...helpersAppBarVariantArticle
  ...helpersAppBarAdStatusBase
}

fragment helpersAppBarAdStatusBase on Base {
  __isBase: __typename
  ... on Section {
    __typename
    ...helpersStyleSectionContent
  }
}

fragment helpersAppBarVariantArticle on Base {
  __isBase: __typename
  ...helpersArticleSections
  ...helpersCheckIsLongReadArticle
  ...helpersCheckIsMorningStudioArticle
  ...helpersCheckIsPhotoEssayArticle
  ...helpersStyleArticle
  ...helpersStyleSectionContent
  ...helpersCheckIsPostiesPage
}

fragment helpersArticleSections on Article {
  sections {
    value {
      entityId
      id
    }
  }
}

fragment helpersCheckIsLongReadArticle on Article {
  articleTypes: types {
    value {
      entityId
      id
    }
  }
}

fragment helpersCheckIsMainTopicContent on Content {
  __isContent: __typename
  topics {
    entityId
    id
  }
}

fragment helpersCheckIsMorningStudioArticle on Article {
  sponsorType
  articleTypes: types {
    value {
      entityId
      id
    }
  }
}

fragment helpersCheckIsPhotoEssayArticle on Article {
  articleTypes: types {
    value {
      entityId
      id
    }
  }
}

fragment helpersCheckIsPostiesPage on Page {
  urlAlias
}

fragment helpersIsArticleVideoAsHeroArticle on Article {
  multimediaEmbed {
    json
  }
}

fragment helpersMassageToNewsletterItemNewsletter on Newsletter {
  entityId
  name
  alternativeName
  description {
    text
  }
  summary {
    text
  }
  homepageDescription {
    text
  }
}

fragment helpersStyleArticle on Article {
  sections {
    value {
      entityId
      id
    }
  }
}

fragment helpersStyleSectionContent on Section {
  fullSectionPath {
    entityId
    id
  }
}

fragment hooksContentHeadlineTagContent on Content {
  __isContent: __typename
  ...hooksContentHelperContent
  ... on Article {
    ...helpersStyleArticle
    types {
      value {
        name
        entityId
        description {
          text
        }
        id
      }
    }
  }
  flag
  sections {
    value {
      name
      id
    }
  }
}

fragment hooksContentHelperContent on Content {
  __isContent: __typename
  ... on Article {
    types {
      value {
        entityId
        id
      }
    }
  }
  authors {
    entityId
    types
    id
  }
  flag
}

fragment hooksUseContentSponsorContent on Content {
  __isContent: __typename
  topics {
    entityId
    sponsor {
      ...sponsorTagSponsor
      name
      type
      id
    }
    id
  }
  ... on Article {
    sponsorType
  }
  ...helpersCheckIsMainTopicContent
}

fragment hooksUseDeepLinkTagsBase on Base {
  __isBase: __typename
  __typename
  urlAlias
  entityId
}

fragment hooksUseDynamicMetaTags on DynamicMetaTags {
  __isDynamicMetaTags: __typename
  metatags {
    key
    value
  }
}

fragment imageContent on Content {
  __isContent: __typename
  headline
  ...checkersCheckContentContainsStarlingImageContent
}

fragment inlineWidgetContent on Content {
  __isContent: __typename
  ...contentNewsletterWidgetContent
}

fragment magazinesStyleArticleMoreOnThisContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ...helpersCheckIsMainTopicContent
}

fragment magazinesStyleCardContentItemContent on Content {
  __isContent: __typename
  topics {
    entityId
    ...topicLinkTopic
    id
  }
  ...entityLink
  ...helpersCheckIsMainTopicContent
}

fragment magazinesStyleFashionCarouselContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment magazinesStyleLeadContentItemContent on Content {
  __isContent: __typename
  authors {
    ...authorNameAuthor
    id
  }
  ...entityLink
  ...helpersIsArticleVideoAsHeroArticle
}

fragment magazinesStyleSpotlightContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ... on Article {
    sections {
      value {
        name
        id
      }
    }
  }
}

fragment morningStudioContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment opinionContentItemContent on Content {
  __isContent: __typename
  ...hooksContentHelperContent
  ...entityLink
  authors {
    entityId
    ...authorAvatarAuthor
    ...authorNameAuthor
    id
  }
}

fragment photoGalleryDialogContent on Content {
  __isContent: __typename
  __typename
  ...contentShareWidgetContent
}

fragment photoGalleryWidgetContent on Content {
  __isContent: __typename
  ...photoGalleryDialogContent
}

fragment postiesPrimaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ...contentCoverImageContent
}

fragment postiesSecondaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ...contentCoverImageContent
}

fragment postiesSectionPrimaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ...contentCoverImageContent
}

fragment postiesSectionSecondaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
  ...contentCoverImageContent
}

fragment primaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment scmpYoutubeContent on Content {
  __isContent: __typename
  urlAlias
  publishedDate
}

fragment searchContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment secondaryContentItemContent on Content {
  __isContent: __typename
  ...entityLink
}

fragment sponsorTagSponsor on Sponsor {
  name
  type
  images {
    url
  }
}

fragment topicCheckSuperTopic on Topic {
  types
}

fragment topicContentListOpinion_cgYJP on Topic {
  latestOpinions: contents(first: 10, filter: {applicationIds: $applicationIds, articleTypeIds: $opinionAndColumnArticleTypeIds}, orderBy: {field: PUBLISHED_DATE, direction: DESC}) {
    edges {
      node {
        __typename
        entityId
        ...contentItemRenderContent
        id
      }
    }
  }
  entityId
}

fragment topicContentListTopicSuperTopicQueueQuery_1LY7E3 on Query {
  topic(filter: {entityId: $entityId}) {
    ...topicCheckSuperTopic
    ...contentTopicLinkSuperTopic
    id
  }
  superTopicQueue: queue(filter: {name: $superTopicQueueName}) {
    items(first: 10) {
      edges {
        node {
          __typename
          ...contentItemRenderContent
          ... on Content {
            __isContent: __typename
            entityId
          }
          ... on Article {
            types {
              value {
                entityUuid
                id
              }
            }
            id
          }
          ... on Node {
            __isNode: __typename
            id
          }
          ... on Gallery {
            id
          }
          ... on Podcast {
            id
          }
          ... on Recipe {
            id
          }
          ... on Video {
            id
          }
        }
      }
    }
    id
  }
}

fragment topicContentListTopic_3In6IJ on Topic {
  contents(after: $after, first: $count, filter: {applicationIds: $applicationIds}, orderBy: {field: PUBLISHED_DATE, direction: DESC}) {
    edges {
      node {
        __typename
        entityId
        ...contentItemRenderContent
        ... on Article {
          types {
            value {
              entityUuid
              id
            }
          }
        }
        id
      }
      cursor
    }
    pageInfo {
      endCursor
      hasNextPage
    }
  }
  relatedNewsletters {
    entityId
    name
    alternativeName
    summary {
      text
    }
    homepageDescription {
      text
    }
    id
  }
  entityId
  advertZone
  id
}

fragment topicHeaderRelatedLinksTopic on Topic {
  relatedLink {
    title
    url
  }
}

fragment topicHeaderTopic on Topic {
  ...topicHeaderRelatedLinksTopic
  ...entityFollowButtonBase
  description {
    html
  }
  mobileImage: image(type: MOBILE_APP_IMAGE) {
    alt
    title
    style(filter: {style: "118x118"}) {
      url
    }
  }
  breakoutImage: image(type: BREAKOUT) {
    alt
    title
    style(filter: {style: "2000x792"}) {
      url
    }
  }
  breakoutSponsorImage: image(type: BREAKOUT_SPONSOR) {
    alt
    title
    style(filter: {style: "1560x218"}) {
      url
    }
  }
  name
  sponsor {
    ...sponsorTagSponsor
    id
  }
}

fragment topicLinkTopic on Topic {
  ...entityLink
  name
}

fragment topicSeoTopic on Topic {
  entityUuid
  entityId
  sponsor {
    name
    id
  }
  name
  description {
    text
  }
  urlAlias
  metaDescription
  ...hooksUseDeepLinkTagsBase
  ...hooksUseDynamicMetaTags
}

fragment topicSponsorArticlesQueueQuery_3wOIuE on Query {
  sponsorArticlesQueue: queue(filter: {name: $sponsorArticleQueueName}) {
    items(first: 20) {
      edges {
        node {
          __typename
          ... on Base {
            __isBase: __typename
            entityId
          }
          ...contentItemRenderContent
          ... on Node {
            __isNode: __typename
            id
          }
          ... on Article {
            id
          }
          ... on Gallery {
            id
          }
          ... on Podcast {
            id
          }
          ... on Recipe {
            id
          }
          ... on Video {
            id
          }
        }
      }
    }
    id
  }
}

fragment topicTopicPageTopic_3In6IJ on Topic {
  contents(after: $after, first: $count, filter: {applicationIds: $applicationIds}, orderBy: {field: PUBLISHED_DATE, direction: DESC}) {
    edges {
      __typename
      cursor
      node {
        __typename
        id
      }
    }
    pageInfo {
      endCursor
      hasNextPage
    }
  }
  id
}

fragment videoDurationOverlayVideo on Video {
  duration
}


relatedNewsletters

relatedLink

description

image

name

entityUuid

urlAlias

metaDescription

items

Gas street lighting in Hong Kong: its history, and where to find the surviving relics of an era that ended over a half-century ago

Relics of a bygone era, gas lamps can still be found in Hong Kong today – as long as one knows where to look.


At last, Hong Kong may be ready to join the wind revolution

But city’s power companies will have to meet environmental and ecological concerns as well as the engineering challenges.


Towngas slumps 15 per cent after missing profit estimates, surprise suspension of bonus shares

Towngas shares dropped by as much as 15 per cent after it posted worse-than-expected annual results and suspended long-standing practice of issuing bonus shares.


Towngas China receives HK$2.8 billion investment from Asian buyout fund manager to accelerate clean energy transition

The mainland division of Hong Kong and China Gas (Towngas) also plans to change its name to Towngas Smart Energy to reflect the group’s ‘future development direction’.


Towngas and top battery maker CATL eye China’s growing demand for renewable energy storage systems

Towngas and CATL plan to set up a joint venture to install energy storage systems in 10 industrial parks initially and also invest in energy-related projects.


Towngas eyes waste-to-energy projects in Greater Bay Area as China pushes for environmentally friendly development

Towngas plans to expand its presence in the Greater Bay Area’s water supply, waste water treatment, municipal waste processing and waste-to-energy businesses.


Towngas customers to pay extra HK$10 per month as Hong Kong supplier raises tariffs by 4.4 per cent

Increase of 4.4 per cent to affect 1.9 million users when it comes in on August 1, with company citing higher labour and operating costs as reasons for rise.


China scrambles to avoid a repeat of last winter’s botched coal-to-gas conversion programme in highly polluting northern rural areas

China Gas, a major natural gas distributor, says it has lined up contracts to ensure it can heat a growing number of rural homes – but some analysts are sceptical as another winter approaches


In a bullish sign, these five companies bought back their own shares in recent weeks

China Gas hit hard by yuan depreciation, lower prices, asset writedowns

Towngas pins growth hopes on China’s push for increased gas use

Founded in 1862, Hong Kong and China Gas Co sells towngas and gas appliances. Towngas mainly serves the needs of domestic, commercial and industrial customers for cooking, heating water and other purposes. The company also has operations in China.


Hong Kong & China Gas

Then & Now100 years of gas street lamps in Hong Kong, and the relics that live on

EditorialAt last, Hong Kong may be ready to join the wind revolution

The InsiderThese five companies bought back their own shares in recent weeks

Towngas slumps 15 per cent after earnings miss, suspension of bonus shares

Towngas China raises HK$2.8 billion to accelerate clean energy transition

Towngas, CATL eye growing demand for energy storage systems in China

ExclusiveTowngas eyes waste-to-energy projects as part of China’s green push

Towngas customers to pay extra HK$10 per month after tariffs rise

China scrambles to convert northern rural homes to gas to combat choking smog

China Gas hit hard by yuan depreciation, lower prices, asset writedowns

NewTowngas pins growth hopes on China’s push for increased gas use