1, first open Baidu on the mobile phone; 2. Click on the Baidu homepage search box; 3. Enter the promise of birth certificate in the search box and click the first one to enter; 4. Finally, click Download Now at the bottom right of the letter of commitment interface.

The birth certificate, also called the birth certificate, is a slim version of the family planning service certificate and a necessary procedure for young couples to have children. You need to use such a "Dan book coupon" before and after the baby is born.