Beijing, September 16 (Youth.cn) - On September 15, 2025, Chimelong Ocean Kingdom in Zhuhai City, Guangdong Province, held a "100-day celebration" for "Wowo", the first successfully hand-reared Pacific walrus calf in China. Due to the mother's lack of "imprinting behavior", she refused to nurse, prompting Chimelong's conservation team to develop a special formula for artificial feeding. Photo/CFP