Iran abolished the dominating position of US dollar and will replace US dollar with renminbi, euro, lira and rouble in its basket of currencies. ANBOUND research team suggests that renminbi will be the perfect alternative since the latter three are in depreciation. With the promotion of "One Belt and One Road Strategy", the economic and trade interactions between China and Iran will be more frequent. China can regard Iran as a major area for financial development along "One Belt And One Road" and set an example of the cross-border use of renminbi.