Your original statement was:
"While true cost overruns in China are affecting some of the things in the US. They have scaled back domestically more than they would've if there wasn't cost overruns in China. It is what it is though."
The article you linked is 2 years old, though I'm missing where it states anything about overruns affecting the US parks and discussion around scaling back the US parks, overall?
The article does state that Disney would be investing an additional $344 million, not $800 million, based on their ownership percentage in the park.
"Disney owns 43% of the still under construction resort with local partner Shanghai Shendi Group having the other 57%.The new investment announced today is coming proportionately from both parties based on their percentage of ownership."