Sun, a singer, has announced his intention to leave his country.
He was quoted as saying on his official Twitter account that he was “sending a message to the world”.
It was unclear whether the tweet was a personal message or a message of farewell.
Solar has been playing for the Sunneks club in Milan for seven years.
He is the fourth-highest scorer in Italy’s Serie A and the second-highest scoring Italian football player after Alessandro Del Piero.
He played his final game in Milan on Tuesday.
The Sunnek team are yet to make an official statement.
The Italian newspaper La Repubblica reported on Wednesday that Sun had already expressed his desire to leave for England and the UK.
Sunnekhin is the son of the legendary Brazilian coach Marcelo Sunneh.
His parents have played a major role in the Brazilian football and his family are well-known in Brazil.