This is completely expected, and the purchase of American Business and Real Estate assets can only continue in the future. No-one should be surprised, or at least no-one who understands International Trade.
You have a trade deficit with China. This means you buy more products from China than you sell to China.
This also means the Chinese Businesses are collecting US dollars for their a significant portion of their sales efforts. When you are collecting currency in a foreign country you have three choices:
--Save the foreign currency as a reserve. This is a reasonable strategy for a small percentage, but not reasonable for a significant amount, since Bond and Deposit interest is typically relatively low while you can't collect interest from money stored in a Safety Deposit Box.
--Convert the foreign currency to your national currency, so that you can carry on business by paying for inputs (wages, rents, raw materials in your own country, thus your own currency). You can only do this on a limited basis, since selling the foreign currency devalues the foreign currency (eg there is an excess of US dollars in the market when you offer for sale US dollars, devaluating US dollars, and simultaneously a shortage of Chinese Yuan when you demand to purchase Yuan, raising the value of Yuan), which forces you to raise prices, which reduces your sales.
--Invest the foreign currency in the foreign country. This means buying assets in that foreign country, like Real Estate and Businesses.
The latter is where the majority of your foreign currency assets must be applied.
The Japanese were doing the same thing in the US during the 1980's, the British have been doing it for 100 or more years worldwide, the US used to do a lot more of it worldwide but still does it in some parts of the world, such as Central and South America, Canada buys US assets and the US buys Canadian assets since the two countries trade between themselves more than any other two nations on Earth, etc.