There are two stocks listed in HK and USA
Baidu - 9888.HK and BIDU
Alibaba - 9988.HK and BABA
Each stock listed in USA is equivalent to 8 shares listed in HK.
The exchange rate between USD and HKD is now 7.78.
The price of the USA ADR should be 8/7.78 = 1.028 of the HK price.
Tan Kin Lian