Chengde

The blaze in Chengde city, Hebei province, broke out on Tuesday night local time and was extinguished in about two hours.

Zhangjiakou and Chengde, cities in the same province, also broke temperature records for June, according to CCTV.

The measures affected about half of the 6 million residents of the port city of Dalian, along with an undisclosed number in Chengde and Shijiazhuang in Hebei province, both around three hours from the capital Beijing.

They include brands like Boncare, which is produced by a company that has repeatedly failed federal testing standards; Yotu, whose manufacturer has also failed European Union testing; and ChiSip, an Amazon top seller whose manufacturer, Chengde Technology, was cited by the C.D.C. for falsely claiming approval by federal regulators.

Chengde has had its emergency authorization status revoked and then reinstated by the F.D.A., and earlier this year the company was cited by the C.D.C. for claiming its WWDoll masks were approved by NIOSH.