Also, the Far Easterners have always looked at the world a little differently than Westerners. This airline was simply trying to provide information to help keep their people safe when traveling abroad.
Besides, Chinese tourists travel to London to see "British" stuff, not communities of non-British people. If they wanted to see Indians they would travel to India as they share a common border. They didn't travel 10,000 miles to see Indians, Pakistanis, or Africans. If they wanted to see those kinds of people they would have traveled to the appropriate places. Remember, these are not Chinese immigrants, they are tourists.