a    For statistical purposes, the data for China do not include those for the Hong Kong Special Administrative Region (Hong Kong SAR), Macao Special Administrative Region (Macao SAR) and Taiwan Province of China.
b    2017
c    Refers to all city districts (excluding Yanqing District) meeting the criteria such as contiguous built-up areas, being the location of the local government, being a Street or Having a Resident Committee.
d    2018
e    Including taxes less subsidies on production and imports.
f    Data classified according to ISIC Rev. 4.
g    Estimate.
h    Index base: 2015=100.
i    2016
j    Asia not elsewhere specified.
k    Data refers to a 5-year period preceding the reference year.
l    2015
m    Refers to foreign citizens.
n    Data as at the end of December.
o    Data revision.
p    2002
q    2003
r    2013
s    2004
t    2014