After investigation, it was learned that from 3,500 years ago to 7,000 years ago, it was a relatively warm period after the end of the Quaternary Ice Age in the history of the earth.

This huge lake has existed until the Han Dynasty more than 2,000 years ago, but when the Western Han Dynasty established a county here, after the immigrants reclaimed, due to the upstream diversion of water for irrigation, the amount of water flowing into Baiyunze gradually decreased, Baiyunze was divided into two, the east is called Dongze, also called the Black Sea, the west is called Xize, also called the White Sea, also known as the White Luze. Bailu is the title of a vassal king of the Xiongnu, because its tribe is stationed on the shore of the ancient Baiyunze, so the name of the lake is changed to "Bailu".

During the Sui and Tang dynasties, the lakes of Dongze and Xize continued to shrink with the rapid development of oases, especially the interception and utilization of various tributaries in the upper and middle reaches of the Yuma River. However, despite the shrinking surface of the lake, the area of irrigated farmland is expanding. Especially since the Ming Dynasty, a large number of immigrants have been resettled, the population has surged, and the water resources of the Yuma River have been insufficient for irrigation; The development of the oasis and the interception and utilization of the upstream reduced the amount of water flowing into the lake, and Bailuze was renamed Shanglin Lake at this time. Later, Shanglin Lake gradually exposed the bottom of the lake, and was soon reclaimed by immigrants from other places. At the time of the Republic of China, the water area of Baishui Lake was about 120 square kilometers, but at this time, only a bay of shallow water overgrown with reeds remained, and the name of the lake was changed to "Baishui Lake".

The appearance of the name of Whitewater Lake seems to represent a sign of uneasiness from heaven. By the end of the 50s of the 20th century, the lake gradually shrank until it dried up and became a sandy beach and alkali basin.

Baiyunze, this vast ocean that absorbs hundreds of rivers, has finally disappeared quietly in thousands of years of vicissitudes, leaving people with endless sentimentality......

This great lake, once known as the sea, struggled and spasmed in agony, and finally dried up like a tear on the earth.

Sun Hui still remembers an old photo of the old waterfowl gathering in Baishui Lake at that time, and a group of large-scale sculptures "Baishui Lake": there are rotating overturned cars on the shore, and the water surface is a fast-moving fishing boat...... In fact, before the idyllic scenery, it should be a pastoral song that resounds around Baishui Lake.

But from the literal understanding of Bai Luze, we know that this is the homeland of the Xiongnu.

There have been many beautiful legends here: according to legend, whenever the wind is clear and the moon is bright, the sheng song orchestra in the lake is melodious and pleasant, and it can be heard for miles. It is also said that in the early years of Baishui Lake, there were golden buffaloes lurking underwater, and when there was a drought every year, it would drill out of the water and spray rain and dew in all directions, so that the surrounding water vapor was steaming, and the rain was continuous, and the crops were often harvested. Later, the golden buffalo was stolen by the Gentiles, and the place fell into a drought. In addition, there is a widespread legend: the Xiongnu Bailu King who was stationed on the shore of Baishui Lake lost the battle with the Han army, and he wanted to lead his troops to surrender to the Han Dynasty, but the news leaked, he was killed by another Xiongnu vassal king, King Hujie, and robbed him of the golden bull used to sacrifice to the sky. His men committed suicide by throwing themselves into the lake because they refused to become subjects of the king of Hujie. Since then, there has been a strange phenomenon in the lake, and every night the sound of singing and playing musical instruments can be faintly heard in the lake, and the singing is very desolate.

Whitewater Lake is a precious belt of sandy vegetation bordered by the Podengiran Desert to the west and the Tolt Desert to the east.

They are just as vast and eroded at the human home.

The staggering size of these two deserts can be seen on the map now. Some experts have studied the historical changes of Baishui Lake over thousands of years and believe that its fate is closely related to the fate of the Yuma River.

Like the white water lake in the past, in the 30s of the last century, it was famous for its abundant water and plants. Subsequently, Nishizawa and Higasaki dried up one after another. It was not until 2002 that Dongze gradually recovered with the infusion of water from the Yuma River. History often repeats itself with strikingly similar faces. At the end of 2007, in order to prevent the expansion of desertification, the local government-led comprehensive ecological management of the Yuma River basin kicked off. In 2010, the water of the Yuma River was injected into Baishui Lake for the first time, forming a lake surface of 4 square kilometers, and since then, there has been a planned ecological water flow to Baishui Lake every year, forming a water surface of 12 square kilometers in 2011 and a water surface of 16 square kilometers in 2012, which is difficult to block the "handshake" between the Podengiran Desert and the Tolt Desert.

Thinking of the efforts made by the people here to restore the damaged ecology, Sun Hui couldn't help but sigh secretly.

"There are a lot of historical monuments in the desert here," Xiao Tiantian said, "I accidentally found a suspected tomb of the Xiongnu king last time I came, because I was in a hurry to find a water source, I didn't pay much attention, only wrote down the general direction, and then went again, but when I arrived at the place, I found that the sand had been buried there, and I couldn't find it at all, so I had to give up." ”

"The tomb of the King of the Huns? Tiantian, didn't you find anything good in it by the way? Sun Hui's eyes lit up.

"There are a lot of good things in it, mostly gold and silverware, and a lot of jewelry and jade, but at that time we were all thirsty and crazy, just thinking about finding water, and I didn't have the strength to take it, I only took a small gold medal, and gave it to Wei Muheng when I came back, and I don't know where he got it. It was from the tiger fighting monster pattern on this brand that I deduced that this tomb might be the tomb of a king of the Xiongnu, because this kind of brand can only be worn by nobles such as princes. Xiao Tiantian replied.

"Oh, what a pity, what a good opportunity." Sun Hui said regretfully, "Tiantian, tell me the location of the tomb when you have time, and when this mission is completed, we will take another trip to see if we can find a handful, maybe we can find that golden buffalo." ”

"You two better save it." Ye Chuchu smiled, "You two are careful that the baby is not dug up, and you trap yourself in the desert." ”

At this time, they were flying at a very high speed, and after about an hour, they entered the desert.

The vast desert, the dead sea of sand. Majestic, quiet, with a straight face, always giving people a monotonous color: yellow, yellow, always a scorching yellow. It is as if nature has frozen the turbulent waves and the empty angry waves here in an instant, making it stand still forever.

In the boundless sea of sand, dotted with clumps of trees, it is sand willow. The clumps of sand willows injected vitality into the originally silent sea of sand. In order to survive in the desert where water is scarce, Salix relies on its tenacious perseverance to dig its roots deep in the sand, up to tens of meters, until it reaches to a place where there is a water source.