National Southwestern Associated University
In 1928, the authority officially changed its name to National Tsing Hua University (NTHU). During the Second World War in 1937, Tsinghua University, Peking University, and Nankai University merged to form Changsha Temporary University in Changsha, and later National Southwestern Associated University in Kunming. After the war, Tsinghua moved back to Beijing and resumed its operation there.