Activate the Three Realms Summoning System at the Beginning

System+Summon+Fantasy+Half Behind the Scenes Gu Changqing traveled through another world and awakened the three world summoning system. Summon to Guigu Zongheng at the beginning to establish super power. In the underworld ahead, the gods retreated. The protagonist will stay behind the scenes in the early stage, but will also go out to practice in the middle stage, pretending to be awesome. The world is a chessboard, all living beings are chess pieces, and he, Gu Changqing, is destined to be the chess player.