1948-49, the mint and used collection (237, with two covers) including Chin Sui Border Area 1948 Mao second printing $500 (2), later surcharges, Suiyuan and Mongolia Area 1949 (Feb.) $2 on $3000, $5 on $5000 and $10 on $10,000, South Shansi Area 1949 (Oct.) mint set of three, North China People's Post 1949 (March-July) surcharges to $100 on $100 mint and used, 1949 (13 July) surcharges to $3000 on $3000 mint and used, 1949 "Temporarily used for" surcharges with $200 on $4 orange-brown noted. Yang between NC275-413, cat. approx. US$1670.