Master Xuanzang passed Yema Spring. Who helped him?

Mohe Yanqi, called Shahe in ancient times, has no birds, no animals and no aquatic plants. Xuanzang could only see his own shadow, meditate on the Heart Sutra and walk alone. The night watchman of the fourth beacon tower told Xuanzang that there was a wild horse spring hundreds of miles west of here. However, after walking a hundred miles, Xuanzang lost his way and didn't find Yemaquan. When Xuanzang was drinking water, he accidentally fell to the ground because of the heavy skin, and the life-saving water that had to travel thousands of miles was used up at once. Xuanzang was in a desperate situation.

The road ahead is unknown, there is no drinking water, and survival is hopeless. Xuanzang intends to return to the fourth lighthouse in the East. After walking more than ten miles, Xuanzang suddenly remembered his oath-"I would rather die in the West than live in the East." At this point, I stopped returning to the east, turned the reins and continued to face the west.

At this time, I found myself at a loss and couldn't see the birds and animals. At night, monsters hold high lights and light them, walking around people (probably because of phosphorus fire and exhaustion, they have hallucinations); During the day, the wind blew wildly and dispersed like rain. I am not afraid of these Xuanzang, but I am too thirsty to walk. After four days and five nights, the dripping water never touched my lips and almost fainted to the ground. On the fifth day, in the middle of the night, suddenly a cool breeze blew, such as taking a cold bath, eyes opened, and the horse could still move forward, so it stumbled for ten miles. The turning point appeared at this time.

After walking more than ten miles, the old horse suddenly took a fork in the road and couldn't pull it back. In this way, he walked a few miles and suddenly saw a few acres of grass. Xuanzang dismounted and let the horse eat himself. Xuanzang walked a dozen paces and turned around. Suddenly, a pool of water appeared in front of him. The pool was sweet and clear, and Xuanzang jumped over ... This old horse who knew the way saved Xuanzang. Xuanzang stayed here for a day. After recovering his strength, he continued to move forward with water and grass. After two days, he finally walked out of the 800-mile quicksand and came to Yiwu, the first country in the western regions.