The controversy over Chinese actress Zhang Ziyi's relief fund established after the May 12 earthquake of 2008 indicates the need for stronger laws to regulate China's charity system, experts say.

The star of "Crouching Tiger, Hidden Dragon" has been under attack since a post on the popular Tianya website in late January accused her of giving only 840,000 yuan of the 1 million yuan ($146,500) she promised for relief work after the devastating Sichuan earthquake.

Chinese netizens have continued to bombard the star with criticism even after Zhang gave the outstanding 160,000 yuan in February and two charity groups, including the Red Cross Foundation of China, released details of her donations to demonstrate her honesty.