BEIJING: A Wells Fargo banker who had been barred from leaving China for several months has been allowed to return to the United States following negotiations between Washington and Beijing, sources told Reuters on Wednesday (Sep 17). Chenyue Mao, a US citizen who was born in Shanghai and is based in Atlanta, had been prevented from leaving China since earlier this year. She has now departed the country, one source said. The exit ban was lifted after talks between US and Chinese officials,