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LONG-TERM INVESTMENTS - Equity method investments and equity investments (Details) - HKD ($)
$ in Thousands
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Jan. 31, 2019
LONG-TERM INVESTMENTS        
Equity method investments $ 229,970 $ 233,834 $ 7,798 $ 6,709
Equity investments without readily determinable fair values 15,754 15,754 15,596  
Total $ 245,724 $ 249,588 $ 23,394