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 was obliged to cooperate with the investigation.

China said Monday that a US-based Wells Fargo banker has been blocked from leaving the country because she “is involved in a criminal case.” Chenyue Mao, an Atlanta-based managing director at Wells Fargo who was born in Shanghai,