TAN ZEKAI ( 1889 - 1948 ) was a Chinese painter. TAN ZEKAI s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1675 USD for CALLIGRAPHY IN RUNNING SCRIPT in 2011 to 69841.5 USD for SEVEN CHARACTER COUPLET IN RUNNING SCRIPT in 2013 , based on the size and medium of the artwork.