Within these self-described limits, Mr Liang and his NGO notched up several famous victories.
Mr Liang is chief executive of Ctrip, one of China's most successful travel companies.
They were unable to determine the cause of death as some of the ducks were already decomposed, Mr Liang said, adding that the bodies had been disinfected and buried.
Mr Liang laments the lack of accountability.
ECONOMIST: China��s Communist modernisers are wrecking the capital
Mr. Liang's last completed transaction in the alleged insider-trading scheme involved Clinical Data Inc.
That allowed Mr. Liang to review documents as they passed through the FDA approval process.
Mr. Liang allegedly bought stock for profit before positive announcements, bet on shares falling after negatives ones and sold shares to avoid losses.
The charges stunned the FDA. Mr. Liang works in the division in charge of approving new drugs, the agency's most visible and sensitive role.
The Justice Department said Mr. Liang's position at the FDA gave him access to the agency's password-protected tracking system used to manage drug applications and drug-safety issues.
Mr. Liang traded stocks of smaller companies developing new drugs, rather than major corporations, to take advantage of the relatively larger swings in these firms' stocks, the SEC said.
According to court documents, officials with the Department of Health and Human Services' inspector general's office installed software on Mr. Liang's work computer that collected screen shots showing how he accessed the tracking system to follow Viibryd matters, including a document recommending approval of the drug.
Liang said only that China was "studying" Mr. Gates's request for a deeper strategic dialogue, and declined to agree on specific dates for future defense talks, saying only that they would occur in the first half of 2011.
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