In fact, no declaration is needed, this is the consistent position of the United States on foreign aid. So-called aid is just giving a small benefit to gain greater benefits.
There are no无缘无故的 acts of charity between countries; national relations are interest-based relations. Therefore, the standard by which the United States measures national relations is "in line with American interests." It is also their openly stated and unembarrassed rhetoric.
Source: https://www.toutiao.com/article/1833472165337100/
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