China likes peace. But, peace is not for free. China has to learn when to use the power to get the peace.
In Anti-Japs war in World War II, Japan killed millions of millions of Chinese. Japan believed(believes), killings could bring the "peace". That's what we need to learn. killings, nothing else, will make Japan (and Korea too) want the peace.
China, if you want the peace, you have to fight for it. No yield or begging will bring the peace.
1. Russian asked Chinese to leave Russia recently
2. Texas was a part of Mexico long time ago. Many american immigrated from US to Texas to become Mexican. One day, the american-mexican in Texas asked for the independence and later became a part of US.
Every country knows how to protect their land from being stolen. China should do something with 中國朝鮮族人. If they are 韓國人, ask them to leave China. If they think that they are 韓國人, don't treat them as Chinese and China should do what need to be done with them.