Luo Zijian from Taiwan likes mountain climbing; Zhang Yibin from Singapore likes Taekwondo; Chen Wenchang from Malaysia likes music; and Ouyang Feifei from Jiujiang, Jiangxi likes guzheng. The four people all love Chinese studies. They came to the Chinese Studies and Culture Lecture Hall of Bailu Academy to study. They accidentally discovered the treasure map of Mount Lu, and went to Mount Lu to hunt for treasures. They traveled through Baiyun Cave to the Yongle period of the Ming Dynasty, and then came back. They found the Biyun Sword used by Zhu Yuanzhang and handed the treasure to the country.