China Gas Holdings needs a painkiller for its headaches from shareholders and potential buyers.

A shareholder screamed and threw a glass in anger at the company's acquisition of a liquefied petroleum gas business at its annual meeting yesterday.

"It should buy natural gas rather than LPG," he said.

Shareholder Wong, in a T-shirt printed with "Japan, get out!" reported to the police after he was stopped from running toward managers.

The company also complained that extensions of a takeover bid by oil giant Sinopec Corp and gas distributor ENN Energy Holdings have boosted expenses.

Sinopec and ENN have postponed the offer deadline to September 6 - the third so far of the unsolicited bid. In December, they proposed to buy China Gas for a combined HK$16.7 billion, or HK$3.50 per share.