Su Xin this time is heading towards the Nine Hell Demons, naturally preparing to resolve the matter with the Great Celestial Demon Lord.
Actually, the relationship between Su Xin and the Great Celestial Demon Lord could be considered truly tricky; they're not enemies, but they cannot be considered allies either.
When the Great Celestial Demon Lord first emerged in the world, he was somewhat unfamiliar with some of the affairs in Jianghu, so naturally, he chose to join hands with Su Xin. However, their cooperation was merely limited to that, without any other personal ties involved, so the Great Celestial Demon Lord would not easily yield the opportunity of the Sky-Reaching Realm to him like Ksitigarbha and Meng Jingxian would.
If it had been in the past, failing to convince with soft tactics, Su Xin might have chosen to strike against the Great Celestial Demon Lord directly, but now, it seems he has some other ideas.