NASA Astronaut Group 21 of more than 18,300). Traditionally, the upcoming class is given a nickname by the previous class. Following this custom, the class of 2009 (also known as "The Chumps") christened the 2013 class the "Eight Balls" in reference to the fact that there are eight of them. In an interview with Bob Behnken, then Chief of the Astronaut Office, stated that the name further represents that, "The eight ball [in billiards or pool] is played last and the hope from the preceding class is that the [2013 astronaut candidates] will be assigned after all of them [fly]." The team consists of
Chinese as a foreign language China. After this period, only Cantonese and Mandarin remained as the most influential variants of Chinese, the former due to the importance of maritime trade in Guangzhou and the emergence of Hong Kong as a key economy in East Asia. Chinese departments in the West were largely centered on Cantonese due to British colonial rule over Hong Kong until the opening of communist-ruled China starting in the 1970s. The teaching of Chinese as a foreign language in the People's Republic of China started in 1950 at Tsinghua University, initially serving students from Eastern Europe. Starting with Bulgaria in 1952, China