This combo photo shows children experiencing bamboo slips for writing at the National Museum of Chinese Writing in Anyang, central China's Henan Province, Feb. 4, 2023 (upper, photo taken by Lan Hongguang), and a visitor experiencing Chinese calligraphy during an event celebrating the UN Chinese Language Day in Rio de Janeiro, Brazil, on April 19, 2023 (lower, photo taken by Wang Tiancong). The UN Chinese Language Day is observed on April 20 every year since 2010, celebrating the language's contribution to the world while encouraging more people to learn it. (Xinhua)