Chinese stocks saw their biggest drop in over four years, as traders grew impatient with the slow pace of Beijing’s stimulus measures. The CSI 300 Index plunged more than 7%. Weak Golden Week holiday spending data further hurt sentiment, wiping out Tuesday's gains after mainland markets reopened. The Hang Seng China Enterprises Index, tracking Hong Kong-listed Chinese stocks, also fell. While equities rallied in recent weeks due to stimulus-driven optimism, strategists are calling for Beijing to back its pledges with real fiscal action to revive the economy.