Core Points - The Shenzhou 21 crew made their first public appearance at the Jiuquan Satellite Launch Center, consisting of commander Zhang Lu, flight engineer Wu Fei, and payload expert Zhang Hongzhang [1][3] - This crew represents a mix of three generations of astronauts, covering the "70s," "80s," and "90s" age groups [3] - Zhang Lu will celebrate the New Year in space for the second time, aiming to blend traditional Chinese culture with space technology [3] - Wu Fei and Zhang Hongzhang are both part of China's third batch of astronauts, with Wu being the youngest astronaut currently on a mission [3][4] Crew Profiles - Zhang Lu, born in November 1976, holds a master's degree and is a senior astronaut with the rank of Colonel in the PLA. He has previously flown on the Shenzhou 15 mission and received the "Hero Astronaut" title [4][5] - Wu Fei, born in October 1993, also holds a master's degree and is a junior astronaut with the rank of Major. He was selected as an astronaut in September 2020 [4][5] - Zhang Hongzhang, born in April 1986, holds a doctorate and is a researcher at the Chinese Academy of Sciences. He was selected as a payload expert in September 2020 [5]