Many businesses have put big spending plans on hold and are trying to cut costs.
"Beware the July rebound narrative. Markets are convinced that easing lockdowns mean the worst is over, but July data show that firms are still largely refusing to invest, borrow and especially now, hire," said Leland Miller, chief executive at data firm China Beige Book.
"This is likely because companies simply do not believe that their COVID Zero nightmare is over."
Caixin's July composite PMI, which includes both manufacturing and services activity, fell to 54.0 from 55.3 the month prior. The Caixin PMI is compiled by S&P Global from responses to questionnaires sent to purchasing managers in China.