President Xi Jinping said on Wednesday China would avoid a hard landing, though he acknowledged some downward pressure on the world's second largest economy.
Chinese leaders have been trying to reassure jittery global markets for months that they have economic developments under control after a shock devaluation of the yuan and a plunge in China's stock market.
Speaking during a state visit to Britain aimed at cementing closer economic ties, Xi said China had entered a "new normal" and that, like other emerging economies, had built resilience to cope with slowdowns after decades of rapid growth.
"The Chinese economy will maintain its strong momentum. There will be no hard landing," he said after Prime Minister David Cameron announced a raft of deals with Beijing worth almost 40 billion pounds ($62 billion).