Which stamp has the highest price?

The p>1963 edition of Preface to Lanting has the highest stamp price. The stamp * * * has two denominations, namely, 8 cents and 1 cents, and two printing methods, namely, the regular edition and the boutique edition. Among them, the price of the boutique version is very expensive, and the market price is as high as hundreds of thousands or even millions of RMB. This also makes Lanting Preface one of the most collectible stamps in China. "Wen 4" refers to four representative works of Wang Xizhi, an ancient calligrapher in China, including Preface to the Lanting Pavilion, Seventeen Postscripts, Self-chanting Postscripts, and Memorial Manuscripts for Nephews. These works were used to design different versions of stamps.