Trade between the Chinese mainland and the Hong Kong Special Administrative Region saw a 10.5 percent decline in the first two months of this year from a year ago. That's according to the Ministry of Commerce.

The MOFCOM data showed bilateral trade totaled 39.3 billion US dollars in January and February. At the same time, the mainland's actual use of Hong Kong investment also declined by more than 20 percent.

Hong Kong accounted for around half of the total offshore investments in the mainland as of the end of February.