Please send your mom an Invitation Letter in the name of your couple, copy of your passport and the resident permit, then you mon can apply for tourist visa for family visit by providing the relationship Certificate.

Mr Peter
please can u tell me wat is the procedure of making the invittation letter. From where or which deartment i have to go for making this paper in shanghai

Mrs.Ibrar, you'd better ask your husband's employer Siemens Company to send an Invitation Letter to your mom. If the company refused to send an Invitation Letter, you can send an Invitation Letter in person describe the passport numbers, name, address, position of your couple, the paspsort number, name, address of your mom, arrival time, stay duration, and departure time, the reason of come to China, etc.