• Mao’s exit ban lifted after U.S.-China negotiations
• China had cited criminal case for Mao’s exit ban
• Mao leads Wells Fargo’s international factoring and cross-border strategies
• Wells Fargo’s China presence smaller than Wall Street peers
• Foreign executives’ exit bans in China raise business concerns

BEIJING, Sept 17 (Reuters) - A Wells Fargo (WFC.N), opens new tab banker, Chenyue Mao, who had been barred from leaving China for several months, has been allowed to return to the United States following negotiations between U.S. and Chinese officials, according to two people with knowledge of the case.