China used to be always dictated by US till few years back, but things have changed drastically in the last five years.

First of all, in the last five years while China has grown rapidly at 10% plus every year, US has been stagnating at less than 2% growth. And China has grown into being the largest investor for US, which it can now use to arm twist US.

Also in the last five years, US has not been able to gain control in Afghanistan and Iraq, from where the new US President is planning to withdraw the US troops as quickly as possible.

All these things have given more courage to China now, which is using North Korea as a tool to upset US further. Already China has voiced its concern for creating another global currency , because it fears that the US dollar may continue to weaken in the coming years.

By making North Korea conduct nuclear tests and also long range missile tests, China has been successfully making US to seek the help of China.