The Qing Emperor was at Dong Mountain.

After the Qing Emperor returned from Dong Mountain, he successfully defeated three Great Grandmasters and finally became the true " King." After 20 years of planning, the Qing Emperor used his strength and schemes to make Ku He and Sigu Jian mistakenly believe that Hong Sixiang was a Great Grandmaster. He successfully lured them to Dong Mountain. The Qing Emperor had also taken Fan Xian and 100 Tiger Guards to Dong Mountain to become a priest. This matter involved deposing the Crown Prince and had a crucial impact on the safety of Li Yunrui, the Crown Prince, and others. The Qing Emperor parted ways with Fan Xian at Dong Mountain and let Fan Xian return to Jingdou to stabilize the situation. Fan Xian faked his death to break out of the situation and launch the final battle with the Qing Emperor. He also supported the Third Prince to live in seclusion in Jiangnan after he ascended the throne.

The Qing Emperor's losses at Dong Mountain included sacrificing 100 Tiger Guards and fake Grandmaster Hong Sixiang, heavily injuring his ally Ye Liuyun, causing him to fall from the Grandmaster Realm, and consuming half of the Qing Emperor's zhenqi reserves. It was unclear whether there were any other losses. The Qing Emperor himself did not die. He had cleverly used Fan Xian and Wu Zhu's help to survive.

After the Qing Emperor returned from Dong Mountain, he successfully defeated three Great Grandmasters and finally became the true " King." After 20 years of planning, the Qing Emperor used his strength and schemes to make Ku He and Sigu Jian mistakenly believe that Hong Sixiang was a Great Grandmaster. He successfully lured them to Dong Mountain. The Qing Emperor had also taken Fan Xian and 100 Tiger Guards to Dong Mountain to become a priest. This matter involved deposing the Crown Prince and had a crucial impact on the safety of Li Yunrui, the Crown Prince, and others. The Qing Emperor parted ways with Fan Xian at Dong Mountain and let Fan Xian return to Jingdou to stabilize the situation. Fan Xian faked his death to break out of the situation and launch the final battle with the Qing Emperor. He also supported the Third Prince to live in seclusion in Jiangnan after he ascended the throne. The exact time when the Qing Emperor returned from Dong Mountain was not mentioned.

In the battle of Dong Mountain, the Qing Emperor had adopted a long-term plan and layout to lure the snake out of its hole and surround it to annihilate it. He believed that there were four threats to his imperial power: the rebel forces in Qing Kingdom, represented by the Eldest Princess; the military forces; Ye Qingmei's remaining forces, including Fan Jian and the Overwatch Council; and the three Grandmasters. The Qing Emperor used Li Yunrui's crazy behavior and her love for him to use her as a tool. At the same time, he filtered out the factions that were unhappy with him. The Qing Emperor's strategy included having Hong Sixiang pretend to be a grandmaster and transfer Tyrannical zhenqi to him. He also had Ye Liuyun pretend to be enemies and hide in Li Yunrui's Junshang Conference. He had also arranged for several hundred Tiger Guards to exhaust Sigu Jian's zhenqi and weaken their fighting strength. Fan Xian used trickery and resourcefulness to set up traps to exhaust Yan Xiaoyi's personal guards. He also found an advantageous position in the battle and finally defeated Yan Xiaoyi. The Qing Emperor's strategy and Fan Xian's intelligence allowed them to successfully defeat the three Grandmasters. The Qing Emperor ascended to the position of true King.

In " Celebrating Years," the Qing Emperor experienced a battle known as the Battle of Dong Mountain. Through 20 years of planning and meticulous planning, the Qing Emperor successfully defeated the three Grandmasters and became the final victor. He used his strength, wisdom, and understanding of his enemies to defeat or cripple the three Grandmasters. The Qing Emperor used his identity as bait to attract the enemy's attention. He then used various methods to weaken them and finally won. The Qing Emperor's goal was to eliminate all forces that posed a threat to his imperial power, including the rebel forces, military forces, Ye Qingmei's remaining forces, and the three Grandmasters. Through this battle, the Qing Emperor successfully achieved his goal and consolidated his ruling position.

The Qing Emperor's return from Dong Mountain was not clearly described in the information provided. Thus, I don't know the specific content of the Qing Emperor's return from Dong Mountain in the novel.

After the Qing Emperor returned from Dong Mountain, he successfully defeated three Great Grandmasters and finally became the true " King." After 20 years of planning, the Qing Emperor used his strength and schemes to make Ku He and Sigu Jian mistakenly believe that Hong Sixiang was a Great Grandmaster. He successfully lured them to Dong Mountain. The Qing Emperor had also taken Fan Xian and 100 Tiger Guards to Dong Mountain to become a priest. This matter involved deposing the Crown Prince and had a crucial impact on the safety of Li Yunrui, the Crown Prince, and others. The exact time when the Qing Emperor returned from Dong Mountain was not found in the search results provided.

The Battle of Dong Mountain in Qing Yuannian's novel happened between chapters 125 and 155.

After the Qing Emperor returned from Dong Mountain, he successfully defeated three Great Grandmasters and finally became the true " King." After 20 years of planning, the Qing Emperor used his strength and schemes to make Ku He and Sigu Jian mistakenly believe that Hong Sixiang was a Great Grandmaster. He successfully lured them to Dong Mountain. The Qing Emperor had also taken Fan Xian and 100 Tiger Guards to Dong Mountain to become a priest. This matter involved deposing the Crown Prince and had a crucial impact on the safety of Li Yunrui, the Crown Prince, and others. The Qing Emperor parted ways with Fan Xian on Dong Mountain and let Fan Xian return to Jingdou to stabilize the situation. Fan Xian faked his death to break out of the situation and launch the final battle with the Qing Emperor. He also supported the Third Prince to live in seclusion in Jiangnan after he ascended the throne. However, the exact time when the Qing Emperor returned from Dong Mountain was not found in the search results provided.

The scene of the Qing Emperor returning from Dong Mountain was after the battle of Dong Mountain in " Celebrating Years." In this battle, the Qing Emperor, Ye Liuyun, Sigu Jian, and the other Great Grandmasters had an intense showdown. The Qing Emperor successfully defeated Ye Liuyun and Sigu Jian and took back the sword furnace. However, the Qing Emperor was also seriously injured. After the battle ended, the Qing Emperor returned to Jingdou from Dong Mountain to continue handling state affairs. The specific scene of his return was not mentioned.