What to do when playing the PC game "Dungeon & Fighter: Avengers" in Japan with high latency in the Chinese version? Is VPN accelerator useful when returning to China?

Players in Japan, have you ever encountered the kind of crazy high latency when playing the Chinese server game "Dungeon & Fighter: A New Century"? As one player said: "When I was playing the group, the skills I released were like slow motion. The monster had killed me, but the skills hadn't hit it yet! ...