Dan Qiu Zi and Dan Akiyama are mentioned in the above two notes. The author made a detailed textual research and wrote a monograph "Dan Qiu Zi —— a general term for Taoist priests in immortal families". The author thinks that Dan Qiu, Dan Qiu Zi and Dan Qiushan, which are often mentioned in the Tea Classics and ancient poems such as Jiao Ran and Li Bai, were first seen in Yuan You of Chu Ci:

Huanyu was born in Xi in Danqiu and left his immortal hometown.

Among them, "Danqiu" refers to the place where immortals live, and it can also be extended to Xian Di, a fairy on the ground, while "Feather Man" refers to the fairy in the sky-Fei Xian.

It is difficult for Dan Qiu Zi to find the source in ancient books, and there is no source of "the immortal Dan Qiu Zi Huang Shanjun" at the beginning of "Seven Things" in The Book of Tea. Lu Yu just made an objective index, and did not explain whether "Dan Qiu Zi Huang Shanjun" was the same person, nor did he explain the relationship between Dan Qiu Zi and then Qiu Zi. In addition, there are many Danqiuzi in the past dynasties, so the author thinks that Danqiuzi is not a real person, but a Taoist of Xianjia.

Both Tiantai and Ninghai (now Sanmen) mentioned above have Danqiu Mountain. The Tea Classic Review records Danqiu Mountain as follows: "Danqiu Mountain, 90 miles south of Ninghai County, Zhejiang Province, is a branch of Tiantai Mountain. Tiantai Mountain is a famous tea producing area and a famous Buddhist area. "

This is annotated according to the ancient "Ninghai County Records". This note is accurate but not comprehensive.

Ninghai is my hometown. Danqiu Mountain originally belonged to Ninghai, and was assigned to Sanmen when Sanmen County was added in 1940. Today, it is located at the southern foot of Lingfeng Mountain next to Sanmen Pavilion. It was named after Ge Xuan (164-244) once made an alchemy here during the Three Kingdoms period. Danqiu Temple was built in the first year of Yuanjia in Song Wendi in the Southern and Northern Dynasties (424). Historically, Danqiu was an alias of Ninghai.

According to the local chronicles of Tiantai, the Danqiu Mountain in the east of Tiantai is originally named Danqiu because of its "soil like Dan, flat top and mountain color like Dan". There must be Hengshan Mountain in Hou Li County, because Danqiu Mountain is in the east of the county, also known as Dongheng Mountain.

This is the reason why authoritative comments on tea classics are the former.

For the places not indicated in Strange Tales from a Lonely Studio, we might as well know about the ancient Ninghai Mountain and the present Sanmen Danqiu Mountain, both of which are named after Ge Xuan's alchemy. There has been wild tea in these mountains since ancient times, and it is also because Taoist Ge Xuan is one of the earliest tea people in Zhejiang. He once planted tea in Tiantai Mountain and was honored as the ancestor of tea planting in Zhejiang. Guiyun Cave in Huading, the main peak of Tiantai Mountain, now has a monument of "Ge Xian Ming Pu".