7 aircraft and 11 cabin layouts, from the A320 to the A350-900. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 7 Shenzhen Airlines aircraft here: the Airbus A320, the Airbus A320neo, the Airbus A321neo, the Airbus A330-300, the Airbus A350-900, the Boeing 737 MAX 8 and the Boeing 737-800.
The Airbus A350-900, with 312 seats: 32 Business, 24 Premium Economy and 256 Economy in its main layout.
The Airbus A330-300 and the Airbus A350-900 have Premium Economy in at least one layout.
The Airbus A330-300, with 31" of seat pitch in Economy and seats 18" wide.