Professional Classification - Standards of China

BB Professional Standard - Packaging	CB Professional Standard - Watercraft	CH Professional Standard - Mapping
CJ Professional Standard - Urban Construction	CY Professional Standard - Publication	DA Professional Standard - Archives
DB Provincial Standard	DL Professional Standard - Electricity	DZ Professional Standard - Geology&Mineralogy
EJ Professional Standard - Nuclear Industry	FZ Professional Standard - Textile	GA Professional Standard - Security
GB National Standard	GJB Professional Standard - Military	GY
HB Professional Standard - Aviation	HG Professional Standard - Chemistry	HJ Professional Standard - Environment
HJB Professional Standard - Navy	HS Professional Standard - Customs	HY Professional Standard - Marine
JB Professional Standard - Machinery	JC Professional Standard - Building Material	JG Professional Standard - Building
JJ National metering standard	JR Professional Standard - Finance	JT Professional Standard - Transport
JY Professional Standard - Education	LB Professional Standard - Tourism	LD Professional Standard - Labor and Safety
LS Professional Standard - Cereal	LY Professional Standard - Forestry	MH Professional Standard - Civil Aviation
MT Professional Standard - Coal	MZ Professional Standard - Civil Affairs	NY Professional Standard - Agriculture
QB Professional Standard - Light Industry	QC Professional Standard - Automobile	QJ Professional Standard - Aerospace
QX Professional Standard - Meteorology	SB Professional Standard - Commercial	SC Professional Standard - Aquaculture
SH Professional Standard - Petrochemical	SJ Professional Standard - Electronics	SL Professional Standard - Water Resources
SN Professional Standard - Import&Export Inspection	SY Professional Standard - Oil & Gas	TB Professional Standard - Railway Transport
TD Professional Standard - Land Management	TY Professional Standard - Sports	WB Professional Standard - Material
WH Professional Standard - Culture	WJ Professional Standard - Military Engingeering Civil Product	WM Professional Standard - Foreign Trade
WS Professional Standard - Hygiene	XB Professional Standard - Rare Earth	YB Professional Standard - Metallurgy
YC Professional Standard - Tobacco	YD Professional Standard - Telecommunication	YS Professional Standard - Non-ferrous Metal
YY Professional Standard - Pharmaceutics	YZ Professional Standard - Post