A three-day lantern riddles event kicked off in Zhangjiakou City, north China's Hebei Province for the upcoming Lantern Festival, which falls on February 19 this year. /VCG Photo

Every lantern riddle has a QR code on the other side of the paper. /VCG Photo

Combining modern technology with traditional culture, people can receive double prizes if they answer correctly through the QR code. /VCG Photo