BEIJING — Police have detained a man suspected of involvement in the case of a Chinese actor who was duped into travelling to Thailand for a film job and then trafficked to Myanmar, China’s Public Security Ministry said. The joint efforts of the ministry’s task force and the Chinese Embassy in Thailand, helped by Thai law enforcement, led to the arrest of a “major criminal suspect” on Saturday, the ministry said in a notice late on Sunday. The ministry added that the suspect was surnamed Yan and returned to China on Saturday, but did not elaborate. Wang Xing, a 22-year-old