Pato appears ready to play on his third different continent in as many seasons, with his first stint in La Liga with The Yellow Submarine proving to be unfruitful.
The 27-year-old is the subject of a reported €18 million bid from Tianjin, with manager Fabio Cannavaro eager to add him to his squad that already consists of new arrival Axel Witsel.
It is rumoured the former Brazil international will put pen to paper on a three-year deal that will see him earn €6m a season.
The aspiring Chinese powerhouses sensed their opportunity to snap up a player who flattered to deceive at Villarreal, only managing a return of six goals in 24 outings.
Pato had moved to El Madrigal last summer following an inconsequential loan spell at Chelsea - where he made just two appearances - from Corinthians.
He has been in Rome in recent days completing his medical, and will join up with his new team-mates as they embark on their pre-season in Italy.
Villarreal coach Fran Escriba had confirmed an "interesting offer" had arrived for Pato, leaving the ex-AC Milan star out of his squad that beat Granada 2-0 on Saturday.
Tianjin's pursuit of Fiorentina hitman Nikola Kalinic fell through earlier in January after he turned down the transfer, forcing Cannavaro to look elsewhere.