Passage: He learned to play table tennis at the age of five and became a member of the provincial team in 1990. In 1994, he joined the Chinese national team. Ma Lin is the only male player ever to win Olympic gold in Singles, Doubles and Team. Additionally, he holds a professional era record of 5 major titles (4 World Cups and 1 Olympic Gold), having won more World Cups than any other male table tennis player in history.Since retiring in December 2013, Ma Lin has been serving as the head coach of the Guangdong provincial table tennis team.

Question: In what year did Ma Lin join the Chinese national team?
1994