FAP, May 10 (Xinhua)-- yesterday, the people's Bank of China carried out a seven-day reverse repurchase operation of 2 billion yuan by way of interest rate bidding to maintain reasonable and abundant liquidity in the banking system, and the operating interest rate remained unchanged at 2%. In view of the fact that there was no reverse repo due on that day, the central bank achieved a net investment of 2 billion yuan in the open market. 100 billion yuan of MLF (medium-term lending facility) will expire next week, and the industry expects the central bank to increase it slightly or continue by the same amount.