Who erected the Jehol stone tablet in the summer resort?

Stone tablet of Jehol in Lisan Summer Resort. According to relevant public information, in 1957, the management department of the summer resort set up a feldspar engraved with the word Jehol by the lake of Jehol Spring. The word Jehol was written by Zhang Jiesan, a famous calligrapher in Chengde. The feldspar stands seven or eight meters south of the current Jehol Stone Carving, so it is the Jehol Stone Monument of Zhang Jiesan Summer Resort.