China's central bank has pumped 870 billion yuan (around 133.8 billion U.S. dollars) into the market

The People's Bank of China (PBOC) on Friday conducted 240 billion yuan of seven-day reverse repurchase agreements (repo), a process in which central banks buy securities from banks with an agreement to resell them in the future.
The operation followed a 250-billion-yuan reverse repo on Wednesday and one of 260 billion yuan on Thursday. With other liquidity1 tools maturing, the total net injection was 680 billion yuan this week.
That was just under a weekly record of 690 billion yuan seen in January and sharply up from a net injection of 70 billion yuan last week.
The reverse repo on Friday was priced to yield 2.25 percent, unchanged from Thursday, according to a PBOC statement.
The injection was taken as the central bank's earlier medium-term lending facility (MLF) operations, reaching billions of yuan, come to mature this month.