The 1 corner in the third set of RMB is divided into nine kinds of coupons, namely, bordeaux corner, back green watermark, back green without watermark, red three Roman gravure with watermark, red three Luo Pingyin, red two Luo Pingyin, blue three Luo Pingyin and blue.

Among them, "Bordeaux Corner", "Green Back Watermark" and "Green Back Watermark-free" are the most rare, and they are also called the three editions of "Three Treasures", among which "Green Back Watermark" coupons are even rarer, also known as the "ticket gallbladder" of the three editions of coins.

The third set of RMB is issued in 1962, and there are 9 versions in the corner of 1. The front pattern of RMB is a combination of education and labor, which closely follows the theme of this set of RMB. 1' s corner figures are realistic and natural, and engraving printing technology is adopted, which makes the picture more expressive and the characters more vivid.