They were followed in that order by Hong Kong, Singapore, Malaysia, Taiwan, Vietnam, and Macau, the company said.
Due to the economic slowdown in their country, Chinese tourists are seeking budget-friendly destinations with easy entry, it explained.
Thailand, Singapore and Malaysia have seen a surge in Chinese arrivals in recent months thanks to their visa exemption.
An increase in tourism campaigns by Vietnam and its low costs are bringing more Chinese tourists to the country.
China surpassed South Korea to become Vietnam's largest source of tourists in May with 357,907 arrivals, or nearly 40% of all foreign visitors.
South Korea and Japan have become ideal destinations for Chinese tourists after their currencies weakened against the yuan, Bloomberg reported citing analysts.