Hanoi (VNA), Oct. 17 -- Ha Long city in the northeastern province of Quang Ninh welcomed 7.9 million visitors in nine months of this year, up 21 percent.

Tourism revenue surpassed 15.7 trillion VND (682.6 million USD), up 35 percent annually.

The World Heritage Site Ha Long Bay is now home to about 500 cruise vessels, 189 of them offer overnight accommodation.

Municipal authorities regularly inspect service quality at restaurants, lodging facilities, entertainment areas and shopping malls.

In the past nine months, they received 141 calls through hotlines and promptly dealt with visitors' complaints, thus improving their satisfaction.

Goods sold at supermarkets and shopping malls ensure quality with clear origin.

Tourism infrastructu...