Luo Pengpeng, a master of seal engraving art, delivers a speech during the opening ceremony of a seal engraving and calligraphy exhibition held at the China International Exhibition Center in Beijing, capital of China, Aug. 21, 2019. 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)