Ronald Reagan, when he was campaigning for President, said that he would break relations with Communist China and re-establish diplomatic relations with Taiwan. But when he got into office, he pursued a very different policy of engagement with China and of increasing trade and business ties with China.
I don't think any foreign Internet company can effectively compete against Chinese companies in the Chinese market. The regulatory environment is so difficult that it's almost impossible for foreigners to have an advantage over locals who have better political connections and who can manipulate the regulatory system much more effectively.