Why doesn't the Chinese government assassinate dissidents overseas like India is doing with the Kalistani movement?

Link: https://www.quora.com/Why-doesnt-the-Chinese-government-assassinate-dissidents-overseas-like-India-is-doing-with-the-Kalistani-movement/answer/CaiLei-2?ch=10&oid=1477743725967857&share=1a0afe9e&srid=EO0pi&target_type=answer