VK (service) friends, as well as a real-time news search. VK updated its features and design on April 2016. As of May 2017, according to Alexa Internet ranking, VK is one of the most visited websites in some Eurasian countries. It is: It was the fourth most viewed site in Ukraine until, in May 2017, the Ukrainian government banned the use of VK in Ukraine. According to a study for May 2018 conducted by Factum Group Ukraine VK remained the fourth most viewed site in Ukraine, but Facebook was twice as much visited. As of May 2018 the site is available in
Xing Qiyi on bufotoxins at Wieland's laboratory. In 1937, Xing returned to China. He moved to Kunming since eastern China was occupied by Japanese invaders. There, he spent some efforts on the refining of Quinine. Then Xing joined the New Fourth Army as a teacher in its military medical school. Moreover, he assisted the army to product medicine. In 1946, Xing went back to Beijing and accepted an appointment as a professor at Peking University. In 1950s, Xing designed a new method to synthesize the chloramphenicol. During 1964–65, Xing participated in the total synthesis of bovine insulin project, co-operating with Shanghai Institutes