What to do if the lag is high when playing the Ninth Continent National Server in the United States? Unlock guide

The national server game "C9" is a popular online game in the United States. "C9" (Chinese name: The Ninth Continent) is a 3D competitive action online game developed by South Korea's Webzen and operated by Zhuhai Xinyou. It is different from general action games with its real sense of hitting, gorgeous and cool combo skills, and exciting competitive gameplay...