1979, 30th Anniversary of the People's Republic, 400 yuan, complete set of four proof gold coins, weight 16.95g x4 (0.917 gold), AGW 2.000oz, each coin is certified by NGC, PF69 Cameo or Ultra Cameo, 23,000 sets were produced of this popular issue (Est. $4,500- $5,500), KM #4-7