In response to the invitation of the Ministry of Public Security, the criminal investigation mission of the Ministry of Public Security of Vietnam led by Director Ruan Chunbi of the Criminal Investigation Department of the Ministry of Public Security of Vietnam including 10 members visited Shenzhen in the company of relevant officers of Guangdong Provincial Public Security Department on 12 and 13 November 2009. We warmly and friendly received the mission in the entire trip, and Deputy Director Qian Wei banqueted the mission.