Investing in Chinese stocks is easier if one chooses to invest via ADRs traded on the US markets or stocks listed on other major exchanges. However investing directly in ordinaries on the domestic market in China is complicated. There are many types of stocks for the same company with different rules and restrictions especially for foreign investors.
Types of Share Classes in China:
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Source: Investing in China: do you know what you’re getting into?, CityWire Money
Related Links:
China ADRs (Only Exchange Listed)
Wikipedia: Shanghai Stock Exchange
Wikipedia: List of companies of the People’s Republic of China
Yahoo Finance: Shanghai Composite Index