Kweichow Moutai, a fiery, sorghum-based liquor, has long been a fixture of Chinese state banquets and the tipple of choice for government officials.

But it’s also known for creating headaches for China’s corruption watchdogs, with expensive bottles of Moutai often misappropriated or used as bribes.

Authorities in Guizhou province, where Moutai is produced and where many officials have been caught illegally reselling the liquor, published a document Thursday detailing five rules forbidding locals to use Moutai for personal gain.

Officials and their family members must refrain from engaging in Moutai businesses, the document says. Officials cannot use their position to help others to get permits to sell or resell Moutai. With some exceptions, they also cannot accept or give Moutai as a gift.

Moutai is the liquor that China’s Premier Zhou Enlai toasted U.S. President Richard Nixon with to celebrate China’s opening to the U.S. in 1972.

But the liquor’s public image has taken a beating since China began a nationwide corruption crackdown in 2012. Moutai, along with Shanghai-made Chunghwa cigarettes, is now used as a shorthand for corruption in onscreen political thrillers.