Legal analysis: After retiring from active service, the parties concerned shall, within 30 days from the date of approval, report to the competent department of resettlement of retired soldiers of the people's government at the county level with the certificate of retirement and the letter of introduction. The competent department of resettlement of retired soldiers shall issue a letter of introduction for retired soldiers when they report for duty.

Legal basis: Article 10 of the Regulations on Registration of Household Registration in People's Republic of China (PRC), if a citizen moves out of the jurisdiction of the place where the household registration is located, he or the head of the household shall apply to the household registration authority for registration before moving out, obtain a transfer certificate and cancel the household registration. Citizens who move from rural areas to cities must apply to the permanent residence registration authority for moving out with the employment certificate of the urban labor department, the school admission certificate, or the approval certificate of the urban household registration authority. Citizens moving to border areas must be approved by the public security organs of the counties, cities and municipal districts where they live.