Illegal immigrants in Laos

If your visa expires, you are living illegally, and the Lao authorities are unlikely to re-apply for your visa. Your passport has expired, but due to your illegal residence status, the Embassy of China in Laos refused to extend it for you. The correct way to deal with your problem is to surrender to the Lao Immigration Bureau and accept the punishment, and then the China Embassy in Laos will issue you a travel permit for returning to China.