Photo taken on Aug. 21, 2019 shows a seal engraving work displayed during an exhibition held at the China International Exhibition Center in Beijing, capital of China. About 120 seal engraving and calligraphy works made by Luo Pengpeng, a master of the art, and her students were on display during the five-day exhibition, which kicked off here Wednesday. Chinese seal engraving was included in UNESCO's intangible cultural heritage list in 2009. (Xinhua/Cui Bowen)