What is the item with a sum in the circle?

Commemorative coins are calligraphy with the word "He". Commemorative coins, which are common in regular script, are called "He Wu Coin" in the market. This coin has a denomination of 5 yuan, a diameter of 30mm, and is made of brass alloy, with a circulation of 250 million pieces. The "He" calligraphy-regular script ordinary commemorative coin was issued by the People's Bank of China on 20 17 12 13 to commemorate the cultural connotation and calligraphy culture of the Chinese character "He" in China. Ordinary commemorative coins have the same function as circulating RMB and the same denomination as RMB.