What certificate does Fushun need to open when he returns to Beijing?

Specific policies for returning to Beijing:

When returning to Beijing, you must hold the negative certificate of nucleic acid test within 48 hours and the green code of "Beijing Health Treasure". Before or after arriving in Beijing 12 hours, you must report to the local community (village), unit, hotel, etc. If the risk of epidemic prevention and control is caused by concealment, false reporting or late reporting, the responsibility shall be investigated according to law. Personnel returning to Beijing must be tested for 1 nucleic acid within 24 hours and 72 hours after arriving in Beijing. If it is not detected in time, "Beijing Health Bao" will pop up a window to remind you, which may affect your travel and daily life.