1950 Chungking (10 Apr) to USA, f.w. Southwest Area March of PLA $50 in pair + $200 + surch $500 x3 + Liberation of Soutwest surch $10000,
1950 Chungking (10 Apr) to USA, f.w. Southwest Area March of PLA $50 in pair + $200 + surch $500 x3 + Liberation of Soutwest surch $10000, in total of $11800 triple weight international letter rate, tied by Chungking bilingual cds, along with registered mark. Transit Canton (21 Apr). Arrived USA (15 May). Despite the "Failed to deliver and return to sender" label on reverse, this cover was successfully delivered.1950.4.10 重慶寄美國，正背貼西南區進軍圖50元雙連 + 200元 + 改值500元x3 + 西南解放改值1萬元，合11800元三倍重量國外掛號郵資，銷重慶三格點線日戳。4.21經廣州。5.15抵美國。雖然背貼“無法投遞 退回原處”封條，但此封成功送遞。
