You can test for mold using an air quality monitor that has a PM1.0. That means it detects particles <1 μm in size which is good for bacteria. Combine that with an air purifier suitable for the size of the cellar.
Windows to cellars should already have trickle vents otherwise it could get damp pretty quickly. Look carefully at the frame of the small window. If no trickle vent, look to install one.
I believe US was trying to trigger a military conflict with Taiwan over chip manufacturing.
They had the short term thinking that China would try plunder Taiwan for TSMC rather than develop their own capabilities.
As the video said, this is the opposite of China's mindset on economic development. China had all the ingredients to become self-sufficient on chip manufacturing and just needed a catalyst to start to cook. Trump became that catalyst and Biden continued to same policy.