Returning to Shuise's room, she found a note and learned that Shuise's boyfriend had been kidnapped. Go to the westernmost mansion in the town. First go to the side room and defeat the centaur monster to obtain the key and rescue others. Then use the key to open the deepest door of the mansion. Shui Se's boyfriend was killed by a monster to protect Shui Se. After defeating the monster, Meng Yu's mission was completed. 
Then switch back to Xuanxin, start from the upper exit in the west of Emerald Town, and go west. If you are level 40 or above, you can try to go to the Dusk Secret Realm on the road to farm some monsters and materials in exchange for money to upgrade (there is an administrator at the guild gate in Green Mountain Town who accepts tasks. You can go back and forth to complete tasks to farm money and equipment, and you will also have a chance to obtain phantom beasts). 
After arriving in Bailing Town, go to the house below. The Elders will tell Xuanxin's father Xuanzhi is trapped in the mine to the south. Went there to find the mine blocked by boulders. Go back to town and find a girl named Genius Xiao Tang. She will ask you to go to the west to collect gunpowder materials. Killing a small dragon called Winter Dragon and Xia Mantis will produce gunpowder powder. After giving the materials to Xiao Tang, you will get explosives to blow up the boulder. 
Enter the mine (the last old answerer is hidden in a corner, and the others can be found in the wild), find Xuanzhi and the fantasy beast Canglong, and learn that he is a descendant of the Gods, and that his father is someone else. After completing the mission, Qin Ming will return to the guild and tell the protagonist about the City of Tears in the west of the mainland, and the two decide to go there to investigate. 
There is a challenge room in the inner part of the guild. You can get good experience and prizes by challenging the BOSS inside, provided you are strong enough. You can reach the Lake of Tears of Heaven from the previous Bailing Town to the west. After placing all 6 statues into the Reincarnation Stone, you can start the teleportation. Defeat the divine guards and enter the City of Tears of Heaven. There are two weirdos in the city, one of whom sells rare equipment in the game, and the other who can provide protoss warriors to join the team. Entering the lowest level of the void, you will meet the Count, who tells the two that he is their real father. After coming out, I saw Shui Se and the demon leader Rhodes dying together (there is a BOSS battle, and it is recommended to challenge at level 55 or above). A few days after returning to the guild, it was discovered that Meng Yu had mysteriously disappeared. . . 