He broke down in tears during an emotional appearance in Taiwan last month when he described feeling abandoned by the NBA.
"Every year it gets harder," Lin said at the time. "In English there's a saying that once you hit rock bottom, the only way to go is up－but rock bottom just seems to keep getting more and more rock bottom for me."
In recent weeks, Lin's representatives turned down an offer from CSKA Moscow to play in Europe.
"I sincerely welcome the arrival of big brother Lin, who has the true skills and strength," said Ducks power forward Zhai Xiaochuan.
"From now on, we are a team and we will fight together for Beijing basketball.
"To all the fans who will see me taking Lin to hang out in Beijing, please shout his name out loud! He is so welcome here!"
