This is pretty fascinating.
Yeah, every state with a big airport got an early start on Covid infections.
China had banned local intra-China travel while at the same time it was encouraging Chinese to travel overseas (and those outbound flights had not shut down, nor had Trump yet banned inbound flights from China since he didn't know the severity yet due to China's lies).
China lied to the US (and lied to the WHO and the WHO lied for China) for 3 weeks while during this time saying that Covid was not human-to-human transmissible, while the Chinese Communist Party actually did know that it was highly contagious, and was taking steps to protect its own people, while cornering the market on raw materials to manufacture masks.
Also at this time, China was cleansing its labs and databases of Covid evidence.
Much of the motivation for this might have come simply from the traditional Chinese character trait of not wanting to lose face. But perhaps more importantly, China didn't want to lose US/World business and industrial/financial investments. Well, they only delayed the eventual (beginning of its) world-trade decline for an extra 3 weeks.
It has been claimed that 95% of the worldwide deaths due to Covid-19 could have been preventable if only the Chinese Communist Party had played the game in a humane way instead of only putting its own self-interests as the only criteria. In other words, that extra 3 weeks of warning that they could have given the world, probably would have been sufficient to prevent 95% of the deaths that actually happened (with more still to come).
Things would have been even worse off if it weren't for the bravery (in the face of possibly spending the rest of their life in a CCP concentration camp) of a couple of Chinese virologists who published the SARS-Cov-2 genome directly into two shared international databases of viruses. The world's research institutions picked it up from there - launching the most massive and time-critical effort of scientific research in human history. The results are still unfolding, so that Covid-research history book has yet to be written.
I'm not sure about the fate of those brave Chinese scientists. One of the early Chinese Covid-research-doctor whistle-blowers actually died of Covid. But do you recall the lady virologist who escaped from China to shelter (and hopefully eventually asylum) in the US, and who appeared on Tucker Carlson? She was on Tucker again a week or two ago announcing that her mother had been arrested and imprisoned within China in punishment for her leaking details of the CCP coverup in the US. What a shame, and how can 1.4 billion people agree to be governed in that manner.
Actually, Xi Jinping is feeling a little nervous and threatened about the stability of his authority at the moment, and he has been conducting a lot of purges in the last few months. They've got epic floods, and explosions in Huawei research/plant facilities, and 1/3 failed crops due to floods, and an economy that is failing worse than the setback to the US economy, all on top of their ongoing Covid pandemic (plus a small bubonic plague scare). Seems like Karma is punishing the Chinese Communist Party pretty severely for their recent escapades, but don't hold your breath if you expect any sort of revolution there. Instead, they are actually contributing to the violence in US streets.