HIKVISION serial numbering

There is confusion in forums regarding serial numbers and region codes. Here is now you read HIK serial numbers: Example for a DVR: DS-7608NI-E2/8P0820160211AAWR123456789WCVU (IP camera serials are similar)

DS-7608NI-E2/8P <- model name
08              <- input channels
20160211        <- production date YYYYMMDD
A               <- CPU freq (A, B, or C)
A               <- DSP freq (A, B, or C)
WR              <- Region code, see below
123456789       <- serial number
WCVU            <- features, see below


Region codes:
-------------
CH <- China
TW <- Taiwan
JP <- Japan
EU <- Europe
NA <- USA
WR <- World/multilanguage
HK
BJ
SH
GZ
CD
AS
RR <- Other/unspecified

Feature codes:
--------------
W <- Supports web
C <- Supports VT
V <- Supports VGA
L <- Supports LCD
U <- Supports USB

The region code controls features, not UI language. There is a separate code for language in bootparams (not in the serial #):

01 <- EN/Multi-language
02 <- Chinese, simplified
03 <- Chinese, traditional