Zhu Yuyao makes leaf vein picture at home in Handan, north China's Hebei Province, Dec. 11, 2019. Leaf vein picture is an intangible cultural heritage in Handan City. (Photos: Xinhua)

Zhu Yuyao teaches a student leaf vein picture skill at home in Handan, north China's Hebei Province, Dec. 11, 2019. Leaf vein picture is an intangible cultural heritage in Handan City.

Zhu Yuyao makes leaf vein picture at home in Handan, north China's Hebei Province, Dec. 11, 2019. Leaf vein picture is an intangible cultural heritage in Handan City.

Zhu Yuyao makes leaf vein picture at home in Handan, north China's Hebei Province, Dec. 11, 2019. Leaf vein picture is an intangible cultural heritage in Handan City.

Zhu Yuyao makes leaf vein picture at home in Handan, north China's Hebei Province, Dec. 11, 2019. Leaf vein picture is an intangible cultural heritage in Handan City.