Bank of China issued proof sets of circulated coins from 1981 to 1986, consisting of seven coins (1, 2, 5 Fen and 1, 2, 5 Jiao and 1 Yuan) and one lunar year medal. The Fens were made with Al-Mg alloy, Jiaos with Cu-Zn alloy, and Yuan with Cu-Ni alloy. The planned mintages were 10,000. Those sets were not for sales but as gift to foreign VIP ( actually, these proof set was given to an uncle of mine when he followed our previous Prime Minister " Tun Mahathir" during a trade mission to China on that year). The actual mintage is believed to be lower than the planned mintages. For example, the actual mintages of 1985 and 1986 proof sets are 4,825 and 660 respectively. The current value for 1985 is about $600-$750 and 1996 is more than $6,000.
There are UNC mint sets for 1979, 1980, 1981, 1983 and 1985. Again UNC sets have a very low mintage. 1979 UNC set has three coins (1, 2, 5 Fens) only, in a blue PVC wallet with a planned mintage of 10,000, while 1980 set has 7 coins and 1 medal in a blue or a black wallet with a planned mintage of 10,000. Both 1979 and 1980 were produced at Shengyang Mint. 1981 UNC set was also produced at Shengyang Mint, housed in a red wallet, with a planned mintage of 13,400, while 1981 proof set was produced at Shanghai Mint. 1982 and 1983 proof sets also were produced at Shanghai Mint. There are two different 1984 proof sets. Shanghai Mint produced a small date 1 Yuan, while Shengyang Mint had a large date 1 Yuan. The medal (rat) of Shanghai Mint is made of red copper while Shengyang is Cu-Zn alloy.
The following circulated coins, between 1979-1986, are very rare, regardless proof or UNC; 1979 5 Fen, 1980 2 Fen & 5 Fen, 1981 1 Fen & 5 Fen, 1982 1,2,5 Jaio & 1 Yuan, 1984 1, 2, 5 Jaio & 1 Yuan, 1985 2 Jaio, 1986 1, 2, 5 Jaio & 1 Yuan. It is my understanding that very limited UNC 1, 2, 5 Jaio & 1 Yuan minted in 1982 and 1984. It is also my understanding that no 1, 2, 5 Jaio and 1 Yuan UNC coins were minted in 1986.
Bank of China also issued proof and UNC sets from 1991 to 2000. The planned mintages for proof sets are 20,000. There is no mintage information available for UNC sets.
This Proof set should be valued at about US$xxx,xxx.00