Pick Up A Fool’S Apprentice summary:

Ling Feibai, the current blademaster, was as noble as an immortal. Kong Xiaomeng, an evil cult's religious fraudster, was as destitute as a dog. The two of them would have never crossed paths until one day, Kong Xiaomeng unexpectedly took in a handsome, elegant man. Not only was the man docile and obedient towards him, but his fighting skills were out of this world. The only thing was... he was a huge idiot that just stayed at home lazing around, even... Kong Xiaomeng: Hey, hey, what are you doing?! Ling Feibai: Master, you don't spoil me! Me, who's so weak, pitiful, and helpless! Kong Xiaomeng: What do I do if I picked up a blademaster?