This stamp sheetlet is a gold foil stamp sheetlet 1997- 10 after the reunification of Hong Kong. In the year of issue, it rose to 500 to 600 yuan, but later it fell to 10 to 20 yuan because of its large circulation. A few years ago, frying oil rose to 70 to 80 yuan above the face value. It fell to face value last year, and now it is several yuan higher than face value. You said you didn't have a postmark here. I am clumsy. How could I not see it? It should be a new ticket, right