Wan shih chü = myriad rocks retreat; studio name of a painter.
Chu shih chü = red rocks retreat; studio name of a painter.
PALACE HALL MARKS
Ch´êng tê t´ang chih = ordered for the Ch´êng–tê (complete virtue) hall.
Ching wei t´ang chih = made for the Ching–wei (reverent awe) hall.