Family of a foreigner working for the foreign-invested company is the spouse and unmarried children under 20 years of age.When the foreigner and the family apply together for the visa or approval, the documents needed are passport, application form and documents verifying the relationship (birth certificate or marriage certificate).When the application is filed separately, additional documents to the ones listed above are the certificate of employment of the foreigner and a copy of the alien registration ID.The visa issued to the family is that of dependent families (F-3) and the length of stay is equivalent to that of the spouse or parent.