China's central bank conducted an overnight ​reverse repo operation ​on Wednesday by setting the borrowing cost ​at 1.25%, unchanged from the previous such operation in late June, people with knowledge of the matter said.The People's ‌Bank of ⁠China said ⁠it injected 206.5 billion yuan via seven-day reverse repos ​at 1.40%. It also injected an additional 600 billion yuan ​through the overnight tenor without disclosing the borrowing cost, according to a statement published earlier in the ​session.All the sources spoke on ⁠condition of ‌anonymity as they are not authorised ​to ​discuss the topic. The PBOC did ⁠not immediately respond to a Reuters request for ​comment.The PBOC said last week that ​it would conduct overnight reverse repo operations from July 29 to 31 and on August 3 to inject a total 2.1 trillion yuan through the overnight tool into the banking system.Wednesday's ‌operation came after PBOC Deputy Governor Zou Lan's comments earlier this month about gradually increasing the frequency of ⁠overnight reverse repo operations to flexibly manage short-term liquidity conditions."The focus of overnight reverse repo operations is ​not on the interest rate itself, but on their ability to regulate ultra-short-term liquidity," Zou said."At this stage, the seven-day reverse repo rate remains the primary policy rate."