The prices of China Petrochemical Hong Kong stocks and A shares are different. There will be differences in prices between the two markets.
Sinopec's trading in Hong Kong stocks follows the trading system of Hong Kong stocks, such as t+0 trading, with no price limit. The trading of A shares follows the trading system of A shares. For example, for t+ 1 transaction, the price limit is 10%.
China Petrochemical's investors are also different. In Hong Kong, most of them are institutional investment and overseas investment. A shares are mostly invested by retail investors, and domestic institutions hold shares.