Where can I check the issuing date of Hangzhou children's residence permit?

Residence permit comprehensive information network. Official website said who inquired about the comprehensive information network of residence permit. The comprehensive information network of residence permit can inquire about the type, issuance and expiration time of residence permit, so the issuance date of Hangzhou children's residence permit is inquired on the comprehensive information network of residence permit. Residence permit is an attempt made by some developed cities in China to learn from the "green card" system of developed countries, which has accumulated experience for China to formulate skilled migration measures and eventually form the national "green card" system of China.