The "Ni hao Kailan" recording was a message from Jack to his friend, Kailan (who shared the same name as the linguist), as a way to practice his Chinese. The conversation was a friendly exchange between the two, discussing language, culture, and life.
The message read: "Look for the uploader's username: OldChinaHand. You'll find the truth behind the Ni hao Kailan archive." ni hao kailan archiveorg
Kailan's investigation led her to a fascinating discovery. The file dated back to 2010, and it seemed to be a recording of a conversation between two individuals. The audio clip was short, but it was long enough to pique Kailan's curiosity. The "Ni hao Kailan" recording was a message