Coin style of commemorative coins for Hong Kong's return to China

The front patterns of the two coins in this set are composed of seven Chinese characters, namely "People's Republic of China (PRC)", "Bauhinia" and the year number "1997", but the casting process of the first coin is inner ring white copper alloy and outer ring brass alloy, and the casting process of the second coin is inner ring brass alloy and outer ring white copper alloy. On the back, the first yellow core is the Basic Law of the People's Republic of China (PRC) Special Administrative Region surrounded by peony flowers, and the white copper alloy part on the outer ring consists of the theme commemorative words of "Celebrating the establishment of the People's Republic of China (PRC) Special Administrative Region" and the face value of "10 yuan". The second white copper alloy inner core consists of the face value of "10 yuan" overlooking Hong Kong Island, and the outer ring of white copper alloy consists of commemorative words and decorative patterns with the theme of "Celebrating the establishment of People's Republic of China (PRC) and the Hong Kong Special Administrative Region".