Smart contract of TKLN token has been repeatedly cloned. One of these fakes was added to the Yobit exchange, thereby affecting the price drop of the original token.
This is one of the reasons why Taklimakan Network was swap TKLN token to TAN token.
More information about this can be found here: https://bitcointalk.org/index.php?topic=2426759.msg48846557#msg48846557