China's stock markets roared back from a week-long break to reach their highest levels in more than two years at the open, before paring gains after officials failed to inspire confidence in stimulus plans intended to revive the economy.

Shares in mainland China soared at the opening, as markets reopened after the Golden Week holidays. But they slid back as the stimulus plans provided by China's economic planning agency seemed to underwhelm investors.

China's stock markets roared back from a week-long break and climbed to their highest levels in more than two years at the open, but lost steam after officials failed to inspire confidence in stimulus plans intended to turnaround a sputtering economy.

China’s stock rally tapered and Hong Kong shares slumped as officials provided few details on economic stimulus plans. Mainland markets surged but then moderated, while the Hang Seng fell significantly.