I believe many of us have been mistaking the Chapter 8 Card as portraying the Four Chiyoumen Leaders and Tentei; wich I believe is not the case. I recall Yu Suzuki giving an interview in wich he explains that the four figures in the Chapter 8 Card are not the Four Chiyoumen Leaders and that they are in fact the Four Grandmasters that Ryo will encounter along his journey through China.
As for the character described by fans as Tentei; I do not recall if he explained who he was; but I think it is related with the Grandmaster called Ryu from Luoyang.
View attachment 17999
As for the other Grandmasters; I do not know who they might be with the exception of one.
I believe that the Character in the bottom left is in fact Xiuying; because if we compare it with the depiction it is given of her character in Chapter Card 11; we will see that they are identical.
View attachment 18000
What further enhances that these are in fact the depictions of the Four Grandmasters is Ryo's "Transformation" or "Evolution" portrayed by his change of outfit from Green to Blue & Red in Chapter Card 8 that we can also see in Chapter Card 11.
Another thing we can uncover in Chapter Card 8 is its location; this clue is given by the Statue we see at the bottom center of the Chapter Card. This Statue is Called the Iron Lion of Cangzhou.
View attachment 18001
Cangzhou is also known as Lion City because of the Statue. The most interesting thing about this location is the fact that it is very neard to a place where one of the most important events in the Shenmue Story happened. If you take a look at the map shown in the next picture you will understand why.
View attachment 18002
That's right Mengcun; the place where Iwao supposedly killed Zhao Sunming "Lan Di's Father".