Wouldn't work
China buys a lot of US debt, US doesn't buy Chinese debt, because China runs at a profit, US runs at a loss.
Their stock markets are not open to foreigners. Hong Kong was the exception, it was the way you could invest in China.
https://en.wikipedia.org/wiki/Shanghai_Stock_Exchange
"The Shanghai Stock Exchange is the world's 4th largest stock market by market capitalization at US$4.0 trillion as of November 2018.[2] Unlike the Hong Kong Stock Exchange, the Shanghai Stock Exchange is still not entirely open to foreign investors"
So there's a flow of capital, but it's the *other* way, *into* the USA. This EO is promulgating a false reality. It's for show, for PR, not for effect.
I wonder how it will affect Musk, and his Chinese car venture. I was reading up on Chinese electric buses, powered by Yinglong and its Lithium Titanate battery that can fully charge in 10 minutes to full (40AmpHrs @~2.25v) and discharged in 6 minutes (400A discharge) and runs all the way down to -30 degrees C, 20000 cycles, 25 years lifespan. 99.8% efficient, you can pierce it with a nail and it doesn't explode. It looks like the future to me and I'd never heard of it till I read an article on their electric buses and realized it was mainstream in China.
Best I can find in English is this guy playing with them:
https://www.youtube.com/watch?v=kYx097cVR48
Without Musk you might think their electric vehicle industry would be dead, but that's delusional. They have their own tech.
Last four years has confirmed the saying: "its always easier to destroy than to build".
Four years is all it took to go from "World Leader" to "Four Seasons Total Landscaping".