After the outbreak, what standard should be used for 120 ambulances in districts and cities?

There are 1 ambulance for every 30,000 people. According to the news released by the client of Xinhuanet on September 27th, 2020, according to the requirements of the national epidemic prevention department, in order to speed up the construction of the three-level pre-hospital emergency system, after the outbreak, districts and cities will be equipped with 1 20 ambulances according to the standard of every 30,000 population, and the ambulance types will be reasonably configured according to the demand of pre-hospital medical emergency services, and the negative pressure ambulances will meet the demand.