The Manchukuo yuan (, Mǎnzhōuguóyuán) was the official unit of currency of the Empire of Manchuria, from June 1932 to August 1945. The monetary unit was based on one basic pure silver patron of 23.91 grams. It replaced the Chinese Haikwan tael, the local monetary system in common and regular use in Manchuria before the Mukden Incident, as legal tender. History Initially banknotes and coins were produced and minted by the Bank of Japan, but were later issued from the mint of the Central Bank of Manchou in the Manchukuo capital of Hsinking (now Changchun) with branch offices in Harbin, Mukden, Kirin (Jilin), and Tsitsihar. The Central Bank of Manchou was opened on 1 July 1932 with a ceremony attended by the Emperor of Manchukuo in person, the new central bank acquired the assets and continued the responsibilities of the previous four banknote issuing banks in the region of Manchuria. The currency that circulated in Manchuria prior to the introduction of the Manchukuo yuan consisted of the banknotes of various provincial banks as well as commercial banks, silver smelting shops (known as yinchang), and pawn shops. Types of old banknotes recovered and later destroyed included high denomination banknotes, banknotes denominated in copper coins, official provincial notes issued by the banks of the provincial government, small denomination coin notes, tiao/diào denominated notes, Chiao/jiǎo denominated notes and others. The 15 different types of currency that circulated in Manchuria prior to the introduction of the Manchukuo yuan were allowed to be exchanged for the new currency by degree for a period of three years, using this method ninety-five point four percent of all previous Manchurian currency that was still in circulation, and the destruction of these old banknotes was handled by officials from the Department of Finance of the government of Manchukuo. The old banknotes were first shredded by machines and then burned, but the number of banknotes that had to be destroyed proved so numerous and new hearths would have to be constructed to burn all the old paper money. Due to worldwide fluctuations in the price of silver during the 1930s, Manchukuo took the yuan off the silver standard in 1935 and subsequently pegged the yuan to, and later reached approximate exchange parity with, the Japanese yen. In 1940 the Manchukuo yuan was being used to measure Manchukuo exports and imports to countries that included America, Germany and Japan. Throughout this