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

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, 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.

The bottom of Qing Yunian's lake was where the Forbidden Door was. In her letter to Fan Xian, Ye Qingmei mentioned that 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 details and secrets of the lake bottom were not mentioned in the information provided.