C542 There Is No Barrier That Cannot be Crossed Only a Heart That Cannot be Cold

Just as he said before he left, he would send Su Zijin a letter every day, letting her know that he had returned to the Nightmare Kingdom due to the matter with Xi Li. However, the letter did not tell her everything, and he would tell her about it when he came back.

The Nightmare Kingdom was a gray area and was connected to many other countries