Dear Stanley,

Thank you for contacting Mearto with your appraisal inquiry. My sincere apologies for the delay with the appraisal.

The presented object appears to be an ink dawing on canvas with measurements of 15.8 in12.7 inches. The painting depicts a typical Chinese landscape. This painting was not painted by the famous contemporary and performance artist AI Weiwei (1957)


Sadly no additional information for an artist with this name fitting in style and motif is given by reference books and databases. 
Comparable objects were recently offered and sold on the international auction market. 
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 1200 to 1800 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards, 

George