Shanghai is one of the few PC titles that supports 16 colors exclusively in Tandy / PCjr computers.
Apparently inspired by a Chinese game called "the Turtle" or "Destroy the Turtle", played with Mahjongg tiles, Brodie Lockard implemented the first digital version of mahjongg solitaire in 1981 on the PLATO system, which in turn led to a commercial online version run by the Control Data Corporation in 1983 before this, Activision's 1986 home version, made the biggest splash yet.
Some boxed games had a Shanghai postcard as bonus Front - original game cover artwork. Back - Game title and subtitle. Offer to a free demo disk for $3.00 at the specified address. Blank space for recipient's address and stamp.