Rare. According to Aiko's query. Com, the ten-dollar plastic Hong Kong dollar bill is listed as one of the most difficult counterfeit banknotes in the world because of its extremely difficult manufacturing process, so its quantity is very rare and its value is incalculable. 10 yuan Plastics HKD will be issued in three years. In 2007, the Hong Kong government began to issue plastic versions with the signature of HK$ 10, with the signatures of Henry Tang in April 2007 1, Zeng Junhua in April 2007 1, June 1 and 20 12.