The immediately infamous throat grab does not take place until the 1:16-mark of the video clip, but trust us and just watch this one from the beginning. The translator is trying to ease the tension between the Taiwanese manager of the EDA Rhinos, Huang Chung-Long, and the American umpire.
Something is obviously lost in the translation, but everyone understands a bit of physicality.
Chung-Long started it with a chest bump and the umpire responded with a stern throat grab to warn the manager.
[H/T: SB Nation]