(1) Data published by statistical departments and government departments at all levels.
(2) Market information and related industry information provided by various economic information centers, professional information consulting institutions, various industry associations and federations.
(3) Literature provided by relevant books, newspapers and magazines at home and abroad.
(4) Information provided by relevant production and operation institutions.
(5) Relevant market information provided by radio and television stations in various countries and regions.
(6) International market information provided by various international organizations, foreign embassies and chambers of commerce.
(7) Documents distributed at various exhibitions, fairs, trade fairs, order fairs and other promotion meetings at home and abroad, and professional and academic experience exchange meetings.