When did the Xuan paper stamps of Zuiwengting come out?

2010May 15, China Post issued the world's first set of Xuan paper stamps-"Ancient Calligraphy in China-Running Script". This set of stamps uses Xuan paper as the printing material for the first time, realizing the perfect combination of "national business card" and "national treasure Xuan paper".

The special stamp of China Ancient Calligraphy-Running Script was designed by the famous stamp designer Wang, with Wang Xizhi's Preface to Lanting, Yan Zhenqing's Sacrifice to His Nephew and Su Shi's Cold Food Poems in Huangzhou as the themes. ***6 stamps, each with a face value of 1.20 yuan, is another set of calligraphy stamps issued after seal script, official script and regular script.

Zuiweng Pavilion has no stamps. Are you mistaken?