why google band in china ? tell me friends

Mainly because Chinese government wants to control information within Chinese network.

1Google stands for freedom of information.

2, China has an authoritarian government that sees freedom of information as a threat to its existence.

3, In 2010, China was a marginal market for the search giant.

4, Google is seen as good, but not indispensable for the majority of internet users in China.

5, Many search engines are more competitive than Google, and they willingly censor themselves to please Beijing.

There are few websites in the "outside" world which are not sourcing Google APIs. This blockage resulted in extreme slowness when loading the rest. Almost equal to blocked.