"Legend of the Sword and the Chivalrous Man 4", who can explain what the ending means?

Personally, I think the ending should be like this:

Tianhe didn't sleep, but he was blind. Tianhe Lingsha Mengli lived happily on Qingluan Peak for a period of time. Ziying traveled around the world, casting swords in the sword tomb (the animation at the end said). Sometimes, he comes to see Tianhe. During Zi Ying's travel, they saw through the world. After Lingsha's death, Tianhe built two graves and carved tombstones (people with such cultivation will not delay anything even if they are blind). One is Tianhe's wife-Ling Sha.

One hundred years later, Li Meng came to see Tianhe. When they saw Ling Sha's grave, they were very sad. At this moment, Tianhe realized that Li Meng had come out of the room. The arrival of his friends made him very happy, while Li Meng was happy and sad at this moment. ...

PS: Dream Glass will take care of Tianhe in the future and will never return to the underworld, because the disappearance of the false dream glass proves that Tianhe no longer needs the false dream glass, because the true dream glass will always accompany them, and the underworld may have changed a hundred years later. Tianhe is not always because it smells like a dragon, so it should be a fortuneteller, and it is Tianhe, not Ziying, who says "Love Wife" on the tombstone. Some people say that Tianhe cannot say this word. Imagine living for so long and experiencing. His feelings should also be very delicate! Ziying likes rhombic yarn, but she gave it up, because she knew rhombic yarn liked Tianhe, just as Li Meng had given it up. In addition, Ziying has also seen through the world after a hundred years, so finally Ziying is an image of a lone swordsman.