THE small fruit shop at the bottom of the Housing Authority's Block 13 in Shekkipmei estate is like many others in Hong Kong. The shelves are a colourful blaze of pomeloes, oranges, grapes and other seasonal fruit which provide a living for the elderly woman and her daughter who run it. However, this shop is special. It is owned by Leung Chui-fun, one of the survivors of the 1953 Shekkipmei fire, and one of the Housing Authority's longest tenants. Mrs Leung was away from her home when the fire broke out, and when she returned she was not allowed back into the squatter area, thus losing all her possessions. For the next four years, she was in temporary housing until moving into Block 5 in the Shekkipmei estate. By then she was married with a daughter, and the family paid a monthly rent of $10 for 120 square feet with no partition, no light, no individual kitchen or bathroom, and a communal toilet on the stairway. Against odds of more than 100/1, she applied for, and succeeded in getting a small shop. In 1973, the family moved to nearby Pak Tin estate because Block 5 was being redeveloped. But being on top of a hill was less convenient, and the following year the family returned to Shekkipmei estate, this time Block 13 above a new shop which she has retained ever since. She lives with seven members of her family in two inter-connected 240 sq ft units in one of the earliest types of Housing Authority blocks. She pays $1,250 total rent for both units. The units have been ''modernised'' by the addition of a minute kitchen and bathroom which were originally communal. Recently, increased power was installed, allowing her to use air-conditioners. Mrs Leung, one of those people for whom public housing was initially established, seems to have been left behind in the oldest building, while others have progressively moved into newer, better designed homes. However, she has nothing but praise for the Housing Authority management staff. Over the years, she has had a good relationship with them, even though it is not so easy with so many people. ''When they paid home visits, usually complaints were quickly dealt with,'' she said. Mrs Leung belies her 60 years, and is very active. For 12 years, she has been chairwoman of the Mutual Aid Committee for Block 13, and she organises outings for the elderly, and other activities for residents. Because Mrs Leung lives in one of the oldest examples of public housing, she is expecting it to be demolished soon and replaced by one of the modern blocks. On a recent visit to Tin Shiu Wai, she saw the Harmony blocks which she thinks are great. Although she is keen to live in one, Mrs Leung does not wish to leave her immediate neighbourhood as she is surrounded by her friends, and hopes that Block 13 will be replaced by a Harmony block.