Who's the main currency manipulator? The US, and its many, many trillions of dollars in debt which other countries are forced to purchase in order to participate in the global market. As long as the dollar remains the world reserve currency, i.e. as long as the US monetary hegemony lasts, the US will remain the leading currency manipulator. They've shamefully printed about 10 trillion dollars the past couple of years.

PRC has made irredentist claims to parts of Tajikistan (Pamir), India (Ladakh), Vietnam (Paracels) and of course Taiwan. They invaded Vietnam in 1979 when the latter overthrew the genocidal Khmer Rouge in Cambodia (PRC supported KR) and have provided support to both the Burmese and North Korean dictatorships. Granted, they haven't done nearly as much meddling as the United States, but they nonetheless demonstrate a willingness to turn a blind eye to the worst sorts of atrocities when it suits them, and a generally expansionist ethos.