In the TV series "The First in the World", Cheng Fei once pretended to be the prince of Jiaotong, and in this identity, he was in the right place with the lord of Yunluo County. This cross-toed state was in the area of present-day northern Vietnam and belonged to a branch of the Land of Baiyue in the pre-Qin period.
In the late Tang Dynasty's famous naturalist Duan Chengshi's "Youyang Miscellaneous Tricks", it is recorded that during the first year of the Tang Dynasty, jiaotongguo took ten pieces of dragon brain incense from the dragon brain tree that was more than a thousand years old and presented it to Tang Xuanzong Li Longji, who in turn gave this incense to Yang Guifei.
In the summer, Li Longji and his brother played chess, Yang Guifei watched the game, and BGM invited He Huaizhi to play the pipa solo. When the game was about to end, Li Longji was about to lose, and Yang Guifei made a clever move to secretly put the pug dog that Kang Guo had paid tribute to next to the seat, and the pug saw the food on the table and jumped on the table to mess up the chess game. It was a bit of a face save for Li Longji.
At this time, a gust of wind blew Yang Guifei's scarf onto He Huaizhi's turban, and the scarf and the turban were entangled for a long time before separating. He Huaizhi was so frightened that he broke out in a cold sweat and did not dare to say a word. When I returned home, I found that the fragrance on my turban was strong, and I treasured it in my bag.
More than ten years later, the Ma Song Incident separated Li Longji and Yang Guifei from life and death, "the poor and the blue fell to the Yellow Spring, and the two places were missing", Li Longji missed Yang Guifei abnormally. One day, He Huaizhi presented the turban he had treasured for many years with a fragrant fragrance to Li Longji and told the reason for that year. Li Longji opened the bag, the aroma was fragrant, and he sighed that this was the aroma of dragon brain incense.
The book also records that this dragon brain incense tree was produced in the country of Boli, which is today's Sumatra, and the dragon brain incense tree is eight or nine feet high, six or seven circumferences, with rounded and white backs, and no flowers. And dragon brain incense is what we often use today - mothballs, can only say that the aesthetics of the Tang Dynasty people are really strange and cute!