The following is an incomplete list of the Chinese blue chip (or red chips) companies traded both in NYSE and HKSE (Hongkong Stock Exchange). Some thinly traded stocks such as China Eastern Airlines (CEA) are not included.
NYSE HK Full Name
ACH 2600.HK Aluminum China
CEO 0883.HK China National Offshore Oil Corp (CNOOC)
CHA 0728.HK China Telecom
CHL 0941.HK China Mobile
CHU 0762.HK China Unicom
LFC 2628.HK China Life Insurance
PTR 0857.HK China Petro
SMI 0981.HK Semiconductor Manufacturing Intl
SNP 0386.HK China Petro and Chemical
For more infomation, check out Yahoo Finance HK. Also I did not listed the number of HK shares each US ADR worth, it would be nice if someone compile a list of that 🙂