Fan Xian opened the secret door and discovered something.

In the end, Fan Xian successfully opened the secret door at the bottom of the lake. According to Ye Qingmei's instructions in the letter, Fan Xian followed her directions into a room in Taiping Courtyard and found a secret door. Although the search results did not clearly mention what Fan Xian found after opening the secret door, it could be inferred that Fan Xian might have found some important information or items inside the secret door. As for what Fan Xian had found in the secret door, the search results did not mention it, so it was impossible to confirm.

In the end, Fan Xian successfully opened the secret door at the bottom of the lake, but the search results did not clearly mention what Fan Xian had discovered after opening the secret door. Therefore, based on the information provided, it was impossible to determine what Fan Xian had discovered after opening the secret door.

Fan Xian had successfully opened the secret door to Taiping Courtyard. According to the descriptions of the search results, Fan Xian followed the instructions in the letter Ye Qingmei had left him and successfully found the secret door at the bottom of Taiping Courtyard's lake and opened it. Although the search results did not clearly mention whether Fan Xian had successfully opened the secret door, it could be inferred that Fan Xian had finally succeeded in opening the secret door of Taiping Courtyard.

Fan Xian had successfully opened the secret door to Taiping Courtyard. According to the descriptions of the search results, Fan Xian followed the instructions in the letter Ye Qingmei had left him and successfully found the secret door at the bottom of Taiping Courtyard's lake and opened it. Although the search results did not clearly mention whether Fan Xian had successfully opened the secret door, it could be inferred that Fan Xian had finally opened the secret door of Taiping Courtyard.

Fan Xian had successfully opened the secret door to Taiping Courtyard. According to the descriptions of the search results, Fan Xian followed the instructions in the letter Ye Qingmei had left him and successfully found the secret door at the bottom of Taiping Courtyard's lake and opened it. Although the search results did not clearly mention whether Fan Xian had successfully opened the secret door, it could be inferred that Fan Xian had finally succeeded in opening the secret door of Taiping Courtyard.

Fan Xian had successfully opened the secret door to Taiping Courtyard. Many of the search results mentioned that Fan Xian had followed the instructions in the letter Ye Qingmei had left him and successfully found the secret door at the bottom of Taiping Courtyard's lake and opened it. Although there was no clear mention of whether Fan Xian had successfully opened the secret door, it could be inferred that Fan Xian had ultimately succeeded in opening the secret door of Taiping Courtyard.

Fan Xian finally succeeded in opening the secret door at the bottom of Taiping Courtyard's lake. In " Celebrating Years," Ye Qingmei told Fan Xian that if he wanted to find the answer, he had to go to the secret door at the bottom of Taiping Courtyard's lake. Fan Xian followed Ye Qingmei's instructions and entered a room in Taiping Courtyard. He found a secret door. Although the search results did not clearly mention whether Fan Xian had opened the secret door, it could be inferred that Fan Xian had finally succeeded in opening the secret door at the bottom of the lake.

Fan Xian discovered that the secret of the Temple was that it was actually a military museum. It stored weapons used by prehistoric humans, technological samples, and seeds of other civilizations. In addition, the temple was controlled by an AI, which carried out the intentions of the temple and sent robot messengers to spread the seeds of civilization. Fan Xian also learned about the nuclear war and the destruction of civilization that Earth had experienced through the holographic projection.

Fan Xian discovered that the secret of the Temple was that it was actually a military museum. It stored weapons used by prehistoric humans, technological samples, and seeds of other civilizations. In addition, the temple was controlled by an AI, which carried out the intentions of the temple and sent robot messengers to spread the seeds of civilization. Fan Xian also learned through the holographic projection of the Temple that Earth had experienced the winter after the nuclear war hundreds of thousands of years ago. Human technology was highly developed, but because of the constant wars, Earth's civilization had been destroyed, and Earth had become the place with the highest nuclear radiation. Before humans left Earth, all weapons, technological samples, and seeds of civilization were preserved in the temple.

Fan Xian discovered that the secret of the Temple was that it was actually a military museum. It stored weapons used by prehistoric humans, technological samples, and seeds of other civilizations. In addition, the temple was controlled by an AI, which carried out the intentions of the temple and sent robot messengers to spread the seeds of civilization. Fan Xian also learned through the holographic projection of the Temple that Earth had experienced the winter after the nuclear war hundreds of thousands of years ago. Human technology was highly developed, but because of the constant wars, Earth's civilization had been destroyed, and Earth had become the place with the highest nuclear radiation. Before humans left Earth, all weapons, technological samples, and seeds of civilization were preserved in the temple.