On December 20, Professors Guo Shunjun郭顺军 of Institute of Geography, CAS, and Gao Meng高蒙 of Hong Kong Baptist, Wang shunyao王舜瑶 of Shanghai University were invited by Shizhen to give academic talks in SKLAET.  Professor Zheng Mei of Pekiong University also visited and joined the event. The speakers gave nice and impressive talks, which attracted many colleagues from the SKLAET.