Teacher’s video advice to wear long johns goes viral in wintry China, where some young people shun the underwear as old-fashioned

A Chinese schoolteacher has become an overnight internet sensation after a video urging her students to wear “tasteless” long johns to keep warm went viral.

The video was shared by parents everywhere, who hailed the teacher, surnamed Cheng – from the Yuhua Experimental School in Kaifeng, in the central Chinese province of Henan – for being warmhearted.