Original God: The Chief Alchemist of the Hall of Rebirth

There is a strange person in the Hall of Rebirth, he claims to be an alchemist, but he does not have the style that an alchemist should have. People can only do alchemy with an alchemy table, but he can do alchemy at will...
"Zhongli! Look at the little boy I made!"
Zhongli: ...
"Little Ying! Want a new Paimon?"
Paimon: The soul is weak!
(This book is a single heroine, Hu Tao and others are all younger protagonists)