A 10-year-old boy and his mother were miraculously rescued 52 hours after the makeshift coronavirus quarantine center where they were staying in China crumbled to the ground, rescuers confirmed.

Xinjia Express Hotel, in Quanzhou City on the southeast coast, caved in around 7:30 p.m. local time Saturday.

Rescuers discovered the pair late Monday night — and freed them from the debris around midnight Tuesday after three hours of painstaking digging.

Meanwhile, the death toll in the collapse rose to 20 on Tuesday, with 10 people still missing. A total of 71 people were inside when the facility collapsed in only seconds.

The 80-room hotel was housing people who came from other regions badly hit by the contagious disease.

Authorities will launch a comprehensive accident investigation to identify the cause of the collapse, and any official found responsible for the incident will face appropriate consequences, Shang Yong, deputy head of the Ministry of Emergency Management, told reporters.

Rescuers have been issued protective gear and a disinfectant as they work on the scene.

The building, first constructed in 2013, was converted into an express hotel in 2018.

An unidentified senior official said Tuesday that the building had been illegally reconstructed several times, according to the Xinhua News Agency.

Two supermarkets on the first floor were being remodeled, and a pillar reportedly deformed a few minutes before the building went down, a district official said Sunday, according to Xinhua.

With Post wires