Hong Kong maintains a very close economic and trade relationship with the Mainland. The Trade and Industry Department closely monitors developments in the economic and business environment of the Mainland, and gathers information concerning the Mainland's introduction of and amendments to trade/commercial laws, regulations and policies relevant to Hong Kong enterprises doing business in the Mainland through various sources. 

The above information is disseminated to local business sector through "Commercial Information Circulars" and other circulars. To facilitate easy retrieval of information, the circulars issued have been classified into different categories as shown below in accordance with the types of information reported therein.

1. Customs Control, Imports and Exports

2. Quality Supervision, Inspection and Quarantine
   
   i)  General Laws and Regulations on Quality Supervision, Inspection and 
   Quarantine 

3. Processing Trade
   
   i)  Catalogue of Restricted and Prohibited Products for Processing Trade
   ii) Measures Related to Processing Trade
   
   

4. Labour and Social Security

5. Taxation and Foreign Exchange
   
   i)   Tariff
   ii)  Corporate Income Tax
   iii) Value-Added Tax
   iv) Consumption Tax
   v)  Business Tax
   vi) Others

6. Rules and Regulations Relating to Anti-dumping, Anti-subsidies and Safeguards
   
   i)    Anti-dumping Cases
   ii)   Anti-subsidies Cases
   iii)  Safeguards Cases
   iii)  Other Cases

7. Foreign Investments

8. Intellectual Property

9. Regulations Relating to Specific Industries
   
   i)   Textiles Trade
   ii)  Regulations Relating to Distribution Services
   iii) Regulations Relating to Individually Owned Stores
   iv) Others

10. Information of the Guangdong Province

11. General Laws and Regulations

12. Other Business and Trade Related Regulations and Information
    
    i)  Regulations Relating to China's WTO Accession
    ii) Others