The plane took off shortly after 11.30am (4.30am GMT).
The aircraft landed in the eastern Chinese city of Nanjing in the afternoon, state broadcaster CCTV said.
Flight tracking websites indicated it arrived around 5.09pm (9.09am GMT).
“In the coming days, an additional 800 or so Chinese nationals suspected of fraud-related crimes are expected to be escorted back to China,” CCTV added.
A Thai border task force official told AFP that 200 more Chinese nationals are expected to be returned on Thursday, crossing from Myanmar in groups of 50.
China has arranged 16 flights over the next three days to ferry 600 of its nationals home from Mae Sot.
It is not clear what fate awaits them, but Chinese security personnel are expected to accompany the returnees on the planes.
Asked about the deportations on Thursday, Beijing’s foreign ministry referred reporters to the “relevant authorities” for details.
“The resolute crackdown on online gambling and telecom fraud is a concrete manifestation of implementing a development philosophy centred on the people,” ministry spokesman Guo Jiakun said at a regular press briefing.
“It is also an imperative choice to safeguard the common interests of regional countries,” Guo said.
The Karen Border Guard Force (BGF), a militia allied with the Myanmar junta, has said it is preparing to deport 10,000 people linked to the compounds in areas it controls on the border with Thailand.
“Two hundred Chinese nationals involved in online gambling, telecom fraud and other crimes were handed over in accordance with legal procedures through Thailand this morning, in the spirit of humanitarianism and friendship between countries,” the Myanmar junta said in a statement.
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