As it turns out, Hong Kong has Mao Zedong to thank for those little green pieces of plas­tic we are obliged to carry on our person: identity cards.

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In 1949, the British colony was preparing for chaos and an influx of refugees, as civil war raged in China. On October 1, Mao established the People’s Republic of China.

Attorney general J.B. Griffin moved ear­lier that summer for Hong Kong to register all per­sons in the colony and issue them identity cards. By September, it was announced the government would register 5,000 people per day, a task that would take years.

In 1960, the South China Morning Post reported that a new ID card would be intro­duced, “measuring 3.5 by 4 inches, lami­nated in plastic, simple, durable and conven­i­ent to handle”. The old cardboard cards were easily spoiled and too big for most wallets. There was, however, one problem: how to record Chinese names.

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“It is quite normal customarily to use more than one name in everyday life in Hong Kong and second there is the difficulty of romanisations,” said D.C. Trench, acting colonial secretary.

Consequently, a Chinese adult would be asked to choose their official name, and use it thereafter in all dealings with the govern­ment. It wasn’t until 1973, however, that the identity card could properly record Chinese names; a headline in the Post on May 10 that year announced: “ID cards will be bilingual.”

Chinese names had also given rise to another problem: that of identity swapping.

“The Chinese, unlike Western societies, have a large number of given names but a limited number of family names,” the Post stated. Dr S.Y. Chung told the newspaper, “Chan, Lee, Cheung, Wong, Ho, Au, Chow, Wu, Ma and Mak represent more than half of the population in Hong Kong.”

Consequently, ID cards were passed around by young people so those under the working age of 14 could gain employment.

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In 1983, the Post introduced readers to the “new look” ID card, which was harder to forge, smaller, designed by the Bank of England and logged on a computer system.

On May 2, 1983, the first day of applica­tions, Hongkongers queued from 4am for their new ID card. While the poster advertising them featured two men grin­ning, applicants had been warned in ad­vance: no smiling during photo-taking, please.