The 33-year-old, who plays in China for Shanghai Shenhua, has scored 16 goals in 39 appearances. His goal on Sunday led his team to the Chinese FA Cup title.
The 30-year-old striker completed a loan move from Shanghai Greenland Shenhua to Old Trafford in the January transfer window, with Ole Gunnar Solskjaer desperate for attacking reinforcements following Marcus Rashford's back injury.