What is the minimum unit of Hong Kong stock options trading?

The minimum unit of Hong Kong stock options trading is 1 contract, which generally corresponds to 100 shares.
For example: 00700, with an expiry date of 15 July 2030, the current price of a put option with an exercise price of 200 is HK$5.5 and the contract value is HK$5.5*100=HK$550.