A Nigerian man was detained in Nantong, Jiangsu province, on suspicion of illegal residence.
On Oct 7, Nantong police found a foreigner registered at a local hotel with a fake passport.
The man, a Nigerian national, was born in June 17, 1976. He entered into the country's Guangdong province in February 2009, but didn't renew his visa after it expired, according to police.
Police said the man was carrying two fake passports.
The man will be detained for one month, and the investigation is ongoing, Nantong police said.