China's Foreign Ministry said on Monday that Chenyue Mao, the Wells Fargo banker who has been blocked from leaving the country, was involved in a criminal case and obliged to cooperate with the investigation.

Despite spotlight on Chenyue Mao matter, foreign ministry says it will ‘welcome people from all countries to travel and do business in China’.

A Wells Fargo banker has been blocked from leaving China due to a criminal matter, the country's foreign ministry has confirmed.