China's central bank skipped open market operations on Tuesday, the second time this week, citing abundant liquidity in the banking system.

The People's Bank of China (PBOC) said liquidity is staying at a reasonable and sufficient level at present.

No reverse repos became mature on Tuesday.

The PBOC has injected liquidity of 1.565 trillion yuan (about 228.2 billion U.S. dollars) into the market in June, with the net injection standing at 107 billion yuan.

China will keep its prudent monetary policy "neither too tight nor too loose" while maintaining market liquidity at a reasonably ample level in 2019.