Meng Xing cried. This is the second time that he cried ever since he arrived in this world. The first time he met Ji Lin here, he cried because of joy. Meng Xing didn't even cry when he almost died before in jianghu. It was his meeting with Ji Lin here that moved his heart. And his heart was moved again, but now because of Ji Lin's death.
He also felt like all his connection to his previous world is now gone. Ji Lin's death tells him that he can never return to his world, which he was secretly wishing for all this time. After all, nothing beats home. But, not only did he leave his home (previous world) when he died, he also now realizes that he can never go back to his home. He will continue to live in this world.