The cutting of rates on deposits, a key source of funding for Chinese banks, underscores the limitations of lower benchmark borrowing rates in reviving loan demand and growth in the world's second-largest economy, which is struggling for traction, analysts and bankers said.

Several Chinese city commercial banks and rural commercial lenders have cut their rates on a range of deposits this week, according to statements released on the banks' websites.

Bank of Nanjing Co Ltd on Thursday lowered the interest rate for three-month deposits by 5 basis points (bps) to 1.35%, by 15 bps for one-year to 1.75% and by 20 bps for five-year deposits to 2.90%, according to a statement on its website.

The smaller lenders followed in the footsteps of some of China's biggest state-owned banks, which implemented rate cuts earlier this month.

That came after the central bank in August cut the one-year loan prime rate (LPR), its benchmark lending rate, by 5 bps, and lowered the five-year LPR, which influences mortgages, by a bigger margin.

However, efforts to boost credit demand to shore up the slowing economy have not delivered the desired result yet.

"Now banks are facing the same problem, which is that credit demand is not strong," said a person at a regional bank, declining to be identified as he was not authorised to speak to the media.

There's a shortage of clients to lend to, which makes controlling costs a vital issue for banks, the person added.

The country's banks extended 1.25 trillion yuan ($173.78 billion) in new yuan loans in August, below analysts' expectations, while broad credit growth slowed, according to data from the People's Bank of China.

China's economy narrowly avoided contracting in the second quarter as widespread COVID-19 lockdowns and the slumping property sector weighed on demand. Analysts said business and consumer confidence remain fragile.

Wang Yifeng, analyst from Everbright Securities Co., expects that there's room for further deposit rate cuts.

The cost of bank deposits is a bit high, as banks are more willing to absorb low-cost funding when they are struggling to lend out money, said Wang.

Wang Yudong, analyst at Minority Asset Management Co, likens the problems facing China's banks to those of manufacturers.

"If prices of finished products drop, you need to lower the prices you pay for raw materials too to protect your profitability."

Peiqian Liu, China economist at Natwest Markets, noted the commercial banks' deposit rate cuts are part of the monetary policy transmission mechanism after the central bank cut key policy rates in August.

"This rate cut by commercial banks will help improve the profit margin slightly and is technically opening up more space for further (benchmark lending) rate cuts."

Four of the five of China's largest banks, except for Bank of China, reported falling net interest margins (NIMs) in the second quarter.

At the end of June, the NIM of Industrial and Commercial Bank of China Ltd (601398.SS) was 2.03%, with Agricultural Bank of China (AgBank) (601288.SS) at 2.02% and China Construction Bank Corp (601939.SS) at 2.09%.

Smaller lenders reported thinner NIMs. Bank of Beijing Co Ltd, for instance, reported a margin of 1.77% at the end of June. The NIM of Bank of Qingdao Co Ltd was 1.76%, and Bank of Shanghai reported 1.66% NIM.

($1 = 7.1929 Chinese yuan renminbi)

(Reporting by Ziyi Tang, Samuel Shen and Ryan Woo; Editing by Sumeet Chatterjee and Kim Coghill)