Hongxing only has twelve halls, not thirteen. There is a line in "Invincible": "There are twelve halls in Hongxing, but only Tuen Mun is the same."
Jiang Tiansheng and Chen Yao are the CEO and general assistant, not the bosses of the halls.
Jiang Tiansheng (later Jiang Tianyang): manages the entire Hongxing and is considered the CEO of the society
Chen Yao (Brother Yao): assistant to the CEO
Twelve Tangkou The managers are:
1. Causeway Bay: Liang Kun (later Chen Ho-nam)
2. Tsz Wan Shan: Big Brother B
3. Sai Wan : Brother B
4. Yuen Long: Ah Xin (the one who often works with Brother B in auctions)
5. Kwai Tsing, Kowloon City: Han Bin (double district) fit)
6. Mong Kok (Poland Street): Thirteen Sisters
7. Tuen Mun: Dinosaur (Pheasant)
8. North Point: Fatty Lai (Da Fei)
9. Tsim Sha Tsui: Prince Edward (Hong Fei)
10. Sham Shui Po: Pretty Mom (the first episode talks about watching Ho Nam grow up)
11. Tsuen Wan: Uncle Hing
12. Aberdeen: Brother Niu (the one with glasses)