More from the article...

... China's expanded Law on the Guarding of State Secrets, which lawmakers passed in February, took effect on May 1 to align with Chinese President Xi Jinping's recent efforts to broaden national security-driven regulations.

The law, which was initially adopted in the 1980s, now has an expanded definition of "sensitive information" and tightened control over social media posts.
Where's the red line?

Taiwan's Mainland Affairs Council (MAC), which handles cross-Strait affairs, said that the expanded legislation was "highly vague and may cause people to break the law at any time."

The expanded law means the risk to people from Taiwan visiting China is likely to "increase significantly," according to an MAC statement.

"You never know where the red line is," said Tao Yi-chun, an assistant professor of sociology at Taiwan's National Tsing Hua University in Hsinchu.

"What is considered a secret?" Tao asked. "This is a very broad and vague restriction, and in most cases, many things can be interpreted in different ways." ...

Back in a prior life, when I worked for a company that had just opened up an office in China....

One thing that stood out to me was China's insistence that the office in China was led by a Chinese national. No US manager was allowed.

China wanted (demanded) control of that office of a US company.

At the time I had thought, wow, this cannot be good.

Of late, I have a better understanding of the issue.