SHANGHAI/SINGAPORE (Reuters) -Chinese stocks tumbled on Wednesday alongside their Hong Kong peers, as investors sought to profit from a blistering rally, which was dampened by the lack of powerful stimulus measures to revive the economy.

A rally in onshore Chinese stocks on their return from a week-long holiday fizzled as traders questioned Beijing’s resolve to add more stimulus. Shares in Hong Kong tumbled.

A stock market rally in China has fizzled out as a highly-anticipated announcement on plans to boost the country's ailing economy disappointed investors. Shares had jumped by over 10% as trading restarted after the Golden Week holiday but fell back after a news conference by the country's economic planners.