It's a common refrain these days from analysts, academics and, increasingly, the President of the United States: China is not doing enough to push North Korea to denuclearize.

Huji Zhao, a retired Professor at the Party School of the Central Committee of the Communist Party of China, agrees. Speaking to NK News, he argues that China could resolve the North Korean issue through a combination of pressure and incentives, providing Pyongyang with a guarantee of security and economic incentives to change.