The Mystic Nine

During the era of the republic, the town of Changsha was guarded by nine families known as the "Old Nine Gates" (or the "Mystic Nine" Clan). They were incredibly powerful families who wield supreme power over everything in Changsha.

In year 1933, a mysterious train ended in Changsha station. The leader of the Nine Gates, Zhang Qishan (William Chan), who was also the army commander of Changsha station, started to investigate with Qi Tiezui (Ying Haoming) and they discovered a highly suspicious mine just outside of Changsha. In order to solve the mystery of the mine, they decided to engage the help of Er Yuehong (Lay Zhang), who was an opera singer that came from a family of archaeologists. However, Er Yuehong was reluctant to help them as his wife Ya Tou (Yuan Bingyan) was terminally ill. In order to procure the medicine for treating her, Zhang Qishan travelled to Beiping with Er Yuehong, Ya Tou, and Qi Tiezui, the eighth leader of the Mystic Nine; they met the young mistress of the hotel Yin Xinyue (Zhao Liying) there. The five of them later returned to Changsha and discovered how the mystery of the mine was connected to their families’ histories and the Japanese's sinister plot against Changsha.

• William Chan as Zhang Qishan (张启山), also known as Fo Ye. The leader of the mystic nine clan and a defense commander for the city of Changsha. He has a strong military influence and the people's trust. Became leader after a rumor spread all over Changsha of him teleporting a Golden Buddha over to his manor in one night.
• Lay Zhang as Er Yuehong (二月红), casually known as Er Ye, is the second master of the mystic nine clan. An expert at tomb raiding due to his family background, but chooses to become an opera singer due to his passion. He specializes in metal pellets and martial arts just like Zhang Qi Shan. He loves Ya Tou dearly.
• Zhao Liying as Yin Xinyue (尹新月), mistress of crescent hotel. Zhang Qishan's love interest and later wife.
• Ying Haoming as Qi Tiezui (齐铁嘴), also called Ba Ye and as Lao Ba, is the eighth master of the mystic nine clan. Saved by Zhang Qishan after he was captured by the Japanese bandits. He is skilled in fortune-telling and divination, also a good friend of Fo Ye and Er Ye.
• Hu Yunhao as Chen Pi Ah Si (陈皮阿四), fourth master of the mystic nine clan who is known for his cruel ways. Specializes in metal pellets and the flying guillotine. He is the disciple of Er Yuehong and Ya Tou and works at their residence. Also has a special love interest for Ya Tou. Falls prey to all kinds of rumors and talks from Commander Lu and The Japanese.
• Yuan Bingyan as Ya Tou (丫头）, Er Yuehong wife. She and Er Yuehong knew each other from young till adult, he saved her from being sold as a slave then they got married. She has a mysterious sickness that Er Yuehong tries to desperately cure.

• Wang Meiren as Huo Jinxi (霍锦惜), the only female member of the mystic nine clan. Raised as head of the household at age 15. She specializes in seduction and carries blades behind her hair. She Loves Er Yuehong. And is willing to give up everything for him. However, she harbors a hate towards Zhang Qishan which causes her to work with the Japanese to get rid of him.
• Wang Chuang as Lu Jianxun (陆建勋), Zhang Qishan's political opponent. A greedy and jealous commander who gets his hands bloody just for what he wants. Dies by the hand of the Mysterious Zhang family after getting his hands on the stone found in the mines.
• Zhang Ming'en as Lieutenant Zhang Ri Shan (张日山), Zhang Qishan right-handed man. He is loyal and obedient and is placed to protect Ba Ye and everyone else when his commander is not around.
• Yang Zijiang as Xiao Xiejiu (小解九), ninth master of the mystic nine clan. Zhang Qishan and Er Yuehong's good friend. He specializes in strategy and planning ahead before an enemy strikes. He has connections with Japanese Departments and Trade networks. He also has some medical knowledge.
• Li Naiwen as Banjie Li (半截李), third master of the mystic nine clan.
• Zhang Luyi as Wu Laogou (吴老狗), fifth master of the mystic nine clan. Has hellhounds that are vicious and scary.
• Li Zonghan as Hei Bei the Sixth (黑背老六), sixth master of the mystic nine clan. Only one among the nine families who has a thug origin.
• Stokes Andrew Charles as Cox Hendry (裘德考), the main antagonist. He gave morphine to Ya Tou to trick Chen Pi A Si into helping him. A mysterious man that has a lot of knowledge about the Mystic Nine.

Chief director, Liang Shengquan has previously directed many well known dramas including The Journey of Flower, Swords of Legends and Chinese Paladin 3.

Cost for the drama amounted up to CN¥168 million; where 70% was allocated for production.^[2] The producer, Bai Yicong expressed his gratitude to the main cast for lowering their professional fee. Usually, payment for the main cast would cost up to 60% of the budget but only 30% went back to the cast of The Mystic Nine. As such, more resources were diverted to the set designing, special effects, equipments and props for production as required by the plot.^[3]

The cast for the series were introduced through posters which were uploaded online.^[4] Chapters related to the character Zhang Qishan (portrayed by William Chan) gained over 70 million readers not long after the announcement of the cast.^[5] A ceremony was held for the drama's commencement on the first day of the Shanghai Television Festival on July 6, 2016.^[6]

The Mystic Nine is Zhao Liying's second collaboration with both William Chan and Lay Zhang, after Legend of Zu Mountain and Royal Treasure respectively.^[7]

Principal photography started on 23 November 2015 at Hengdian Studios.^[8] The entire series took 108 days to complete filming.^[9] The scenes set in Zhang Qishan and Er Yuehong's mansion were filmed in Hengdian World Studios, in Dongyang, Zhejiang province. The tombstone scenes were filmed in various parts of China such as Tiantai Mountain, Jietou Town and Hanshanhu at Tiantai County and Yongkang in Zhejiang province and in Manchuria.^[10]

The series placed first in television ratings and became the number one most searched and discussed topic online during its broadcast.^[11] The drama also set a record for the most online views garnered in a day.

Following the series, a wax figure dressed of Zhang Qishan (portrayed by William Chan) was added to Madame Tussauds Shanghai in April 2017.^[12] Another wax figure of Er Yuehong (portrayed by Zhang Yixing) was added to Madame Tussauds Shanghai in October 2018.^[13]

The drama garnered over 12 billion viewers on iQiYi,^[1] and earned about CN¥288 million.^[14]

• Highest ratings are marked in red, lowest ratings are marked in blue
• In China, 1% viewership rating is considered extremely high since China has a high population.

The drama endorsed a number of brands throughout the whole broadcast. Apart from endorsing the title sponsor to the series, Xiang Piao Piao, the brand also endorsed Eastroc Super Drink, Rio, iQianJin, Mengniu Dairy, Tantan App and Ctrip.^[16]

On October 20, 2016, a side story of the drama was released under the title The Mystic Nine Side Story: Flowers Bloom in February (Chinese: 老九门番外之二月花开; pinyin: Lǎo jiǔ mén fānwài zhī èr yuè huā kāi; lit. 'Old Nine Gates Flowers Bloom in February') as a web film. The web film is a continuation of the television series. Several more internet films were later produced, which focused on the supporting characters' side stories.

• Flowers Bloom in February (二月花开); featuring Er Yuehong^[21]
• Tiger Bones Plum Blossom (虎骨梅花); featuring Jie Jiuye^[22]
• Four Belongs to Abelmoschus (四屠黄葵); featuring Chenpi Ah Si^[23]
• Ganges Killing the Trees (恒河杀树); featuring Huo Jinxi^[24]