China Construction Bank Corp., the world’s second-largest lender by assets, reported its worst earnings in more than a decade as a cascade of loans to businesses across China are going bad.

Net income fell 11% to 137.6 billion yuan ($20 billion) in the six months through June from 154.19 billion yuan a year earlier, the Beijing-based lender said in an exchange filing on Sunday. Loan loss provisions jumped 49%.

China’s $45 trillion banking system has been put on the front-line of helping alleviate the worst economic slump in 40 years, triggered by a large scale shutdown due to the virus outbreak. Authorities have required lenders to forgo 1.5 trillion yuan in profit by providing cheap funding, deferring payments and increasing lending to small businesses struggling with the pandemic.

In total, the nation’s more than 1,000 commercial banks posted a 24% decline in second quarter profits, with non-performing loans hitting a record 2.7 trillion yuan. Citigroup Inc. last month slashed 2020 to 2022 earnings forecasts for major Chinese banks by more than 10 percentage points and expects them to suffer a 13% drop in profit this year.

“Under mounting political pressure, China banks not only have had to further cut loan yields to subsidize the real economy, but also need to accelerate counter-cyclical provisioning and adopt more conservative NPL assumptions in setting provisions,” Citigroup analysts led by Judy Zhang wrote. “The potential negative earnings growth will overhang the China banks’ near-term share performance.”

Investors have never been so downbeat on Chinese lenders’ outlook. Shares of the biggest banks are trading at about 0.45 times their forecast book value, a record low valuation, after underperforming the benchmark indexes in Hong Kong and on the mainland for most of the past five years.

Moody’s Investors Service expects bad loan pressure to stay high amid weak consumer sentiment, putting banks’ profitability under stress for the rest of 2020. Economists forecast gross domestic product will grow 2% this year, slowing from 6.1% in 2019.

Chinese banks joined the chorus of global lenders warning about a difficult economic outlook. HSBC Holdings Plc said the fallout from the pandemic may trigger loan losses of as much as $13 billion this year, while JPMorgan Chase & Co. spoke of a protracted downturn and said government stimulus was making it harder to gauge the economic damage.

In the worst case, China banks could be guided to reduce profit by around 20% to 25% in 2020, according to Jefferies analyst Shujin Chen. Further reduction would hurt banks’ capital even without any dividend payout and would be harmful to financial stability, she said.

China is recovering slowly as President Xi Jinping is accelerating his push to make the economy more independent amid a broadening confrontation with the U.S. over everything from trade to finance and technology.

Tensions between the world’s two super powers over Hong Kong has sparked tit-for-tat sanctions on politicians and officials on both sides over the past few weeks. China’s biggest lenders are looking over their accounts in order not to endanger their access to crucial dollar funding. The nation’s four largest banks had $1.1 trillion in such funding at the end of 2019 and could face fines for doing business with any of the 11 Hong Kong and mainland officials targeted by U.S. sanctions, according to Bloomberg Intelligence.