US Export Rules Mess Up Synopsys Forecasts

Okay, so get this. Synopsys, you know, the company that makes that chip design software, totally pulled back their money predictions just a day after they put them out. Wild, right?
It all happened because of these new rules the US put in place about selling stuff to China. It's making everything really fuzzy for Synopsys and their ability to sell their software there. Honestly, who knows what's gonna happen now? Their stock even went down a bit after the markets closed, and it was already lower during the day.
They said they got a letter from some government folks, the Bureau of Industry and Security, telling them about these new China rules. This was after they had shared their latest financial stuff. They're basically saying they're trying to figure out how big of a hit this is gonna be to their business and how much money they'll make or not make. Maybe they're a little stressed?
Apparently, the US told a bunch of companies to stop sending things to China unless they get a special okay. They even took back some permits they had already given out, and this is according to some people who know what's going on. Companies that make that specific software for designing chips got letters saying they'd need a permit to sell to customers in China now. Besides Synopsys, this includes companies like Cadence and Siemens EDA, which is part of Siemens.
Siemens said they're gonna try to help their customers all over the world deal with these new rules. Cadence also said they got a heads-up about the permit thing. They said the new rules are pretty complicated, and they're talking to the government to get a better idea of things while they figure out how this will affect their business and money. Idk, it just seems like a mess.
These new rules, which are probably not making things any better between the US and China, seem like they're trying to make it hard for China to get certain products they need for important industries. Like, really trying to stop them at key points.