S. 3989 is a bill that wants to stop the U.S. military from working with companies if they have lobbyists who help China's military or people who break human rights. Companies have to show they don’t have these lobbyists, and the U.S. can choose not to follow this rule if it’s really important for the country's safety.

The bill wants to stop certain companies that do bad things, like using forced labor in China, from being allowed to sell stocks on big American stock markets. It tells important people to make a list of these bad companies and to keep everyone in the government informed.

In simple terms, this bill wants to stop certain Chinese companies from helping Russia by punishing them, especially if they're giving military help or sharing special technology that could be used for bad reasons. It also wants to be careful about sending important technology to China to make sure it doesn’t end up helping Russia in any way.

The bill wants to make sure that certain drones and communication gadgets from specific companies are safe to use by asking a government group to keep an eye on them, and it also plans to give some money to help police and firefighters buy secure drones.