Reconstructed rules of Shanghai Classical majiang

This is a 2nd try of the post.

Here Shanghai Classical majiang refers to the majiang game popular in
Shanghai, especially in the whorehouses, in about 1890s~1910s. The
reconstruction is based on the various late Qing Chinese literatures
and three earliest Chinese majiang manuals, of which two was not later
than 1914 and another one was not later than 1920. This is just a
draft version.

Base score for winning: 10 pts
MP/CP/MK/CK of 2s~8s: 2/4/8/16 pts
MP/CP/MK/CK of 1s, 9s and Non-Seat Winds: 4/8/16/32 pts
MP/CP/MK/CK of Seat Wind and Dragons: 4/8/16/32 pts + 1 dbl
Pair of Seat Wind and Dragons: 2 pts
Impure One-Suit: 1 dbl
Pure One-Suit: 3 dbl (limit in a 1909 novel)

Closed Wait: 2 pts
Edge Wait: 2 pts (sometimes 0 pts)
Single Wait: 2 pts (sometimes 0 pts)
Fishing with Multiple Waits: 0 pts (sometimes 2 pts)
Selfdrawn: 2 pts

Special Hands(10 in total):
Heavenly Hand: limit
Earthly Hand: 1/2 limit (or limit, if an additional double exists)
Three Dragons: limit (3 dbl in a 1894 novel - thus no Three Dragons, 2
limits in a 1909 novel)
Four Winds: limit (Four Pungs, or Three Pungs and One Pair with Pung
of Seat Wind included)
Nine Gates: limit
Thirteen Unios: limit
All Chows: 0 pts (later 10 pts/1 dbl, or even 10 pts + 1dbl)
All Pungs: 10 pts (ever 4 pts, later 1dbl)
Moon from the Bottom of the Sea: 10 pts (ever 4 pts, later 1dbl)
Blossom on the Roof: 10 pts (ever 4 pts, later 1dbl)
Golden Cock: 10 pts (ever 4 pts, later 1dbl)
Robbing a Kong: 0 pts (later merged with Golden Cock)

limit = 300 pts

14 tiles' dead wall.
Bao rules.
East doubling.
Payment between all players.
No points for Too-Many hand.
No points for all if no one wins.
300 points' penalty for false mahjong.

ithinc