Police in Quang Ninh Province on Vietnam's border with China have fined four Chinese nationals VND16 million ($700) in total for entering the country illegally.
Immigration officers discovered the group at a hotel in the tourist town of Ha Long on Sunday, the Vietnam News Agency reported.
The tourists, aged between 34 and 46 years old, said they wanted to visit Ha Long Bay but did not want to go through a travel company.
They crossed the border on Sunday afternoon and booked a Vietnamese driver to take them to Ha Long, which is around a four-hour drive from the border. They said they planned to return to China the next day.
Police also fined the driver VND7.5 million for carrying illegal arrivals.
Nearly 2.7 million Chinese tourists visited Vietnam in 2016, a 51 percent increase from the previous year.
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