What's at the bottom of the lake to celebrate the year?

The bottom of Qing Yunian's lake was where the Forbidden Door was located. According to Ye Qingmei's letter to Fan Xian, the forbidden door was hidden at the bottom of the lake. It was also the final location of all secrets. This Forbidden Door might be a laboratory with modern high-tech equipment, such as mobile phones, navigation, computers, etc. Fan Xian might open this door and enter the hidden door. There might be many terrifying things inside the hidden door, and many truths were hidden. Ye Qingmei also mentioned that opening this secret door required one to be prepared to face the abyss at any time. Once it was opened, Fan Xian's life would undergo a tremendous change. Ye Qingmei's death was related to this secret. Fan Xian might reveal the truth of his mother's death to fight to the death with the Qing Emperor. In short, the secret at the bottom of Taiping Courtyard's lake might involve Fan Xian's life and fate, as well as the truth of Ye Qingmei's experiments and seeds.

The bottom of Qing Yunian's lake was thought to be a place called the Forbidden Gate, or it could be a temple. According to the description in the novel, there might be some high-tech instruments and scientific literature hidden at the bottom of the lake, as well as letters between Ye Qingmei and the Qing Emperor. However, the specific details and content were not clearly answered in the search results provided. Thus, I am currently unable to determine what exactly is at the bottom of Qing Yunian's lake.

[The bottom of the lake where Qing Yunian was located is the Forbidden Door.] According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory, and there might be modern high-tech equipment inside. Fan Xian might open this door and enter the hidden door. There might be many secrets inside the hidden door.

The bottom of Qing Yunian's lake was where the Forbidden Door was. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory, and there might be modern high-tech equipment inside. Fan Xian might open this door and enter the hidden door. There might be many secrets inside the hidden door.

The bottom of Qing Yunian's lake was where the Forbidden Door was. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory, and there might be modern high-tech equipment inside. Fan Xian might open this door and enter the hidden door. There might be many secrets inside the hidden door.

The bottom of Qing Yunian's lake was where the Forbidden Door was. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory, and there might be modern high-tech equipment inside. Fan Xian might open this door and enter the hidden door. There might be many secrets inside the hidden door.

The bottom of Qing Yunian's lake was where the Forbidden Door was. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory. There might be modern high-tech equipment inside, such as mobile phones, navigation, computers, and so on. Fan Xian might open this door and enter the hidden door. The biggest secret of the Forbidden Door was related to Fan Xian. It involved the reason he had come to this world.

The bottom of Qing Yunian's lake was thought to be a place called the Forbidden Gate, or it could be a temple. According to the description in the novel, there might be some high-tech instruments and scientific literature hidden at the bottom of the lake, as well as letters between Ye Qingmei and the Qing Emperor. However, the specific secret of the bottom of the lake was not clearly revealed in the search results provided.

The bottom of Qing Yunian's lake was where the Forbidden Door was. According to the contents of Ye Qingmei's letter to Fan Xian, there was a forbidden door hidden at the bottom of the lake. It might be a laboratory, and there might be modern high-tech equipment inside. Fan Xian might open this door and enter the hidden door. There might be many secrets inside the hidden door.

The bottom of Qing Yunian's lake was thought to be a place called the Forbidden Gate, or it could be a temple. According to the description in the novel, there might be some high-tech instruments and scientific literature hidden at the bottom of the lake, as well as letters between Ye Qingmei and the Qing Emperor. However, the specific details and content were not found in the search results provided.