The tourist numbers have gone up by 11.4 per cent year on year, the China National Tourism Administration (CNTA) said.
Domestic tourists spent 385.6 billion yuan (USD 57.55 billion) in that period, up 13.6 per cent from the same period a year ago, it said.
The National Day holiday, which runs from October 1 to 8, sees a surge in passenger flows as leisure travel has become a major holiday entertainment due to improving living standard, a CNTA official said.
According to Ctrip.com, a leading travel service provider, outbound trips are expected to exceed 6 million during the holiday.
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One of China's two "Golden Weeks" this year's National Day holiday has been extended by one day as the Mid-Autumn Festival falls today.
Travel demand appears to be stronger this year, possibly because the Mid-Autumn Festival is a time for family reunion, the report said.
China has pressed drones into service to regulate traffic in several parts of the country as millions of people are heading home and tourist resorts during the holidays.