&gt;&gt;It does count as credible, but neither that WaPo article nor the link in your 2nd edit even mention the word &#x27;subsidy&#x27;.<p>I don&#x27;t see a remarkable difference between charging someone &quot;less than actual cost&quot; and the word &quot;subsidy&quot;.<p>But, it sounds like you&#x27;re looking for a credible source specifically on Chinese government subsidies made to Chinese exporters.  That would be difficult to find, as it would likely violate treaties...the Chinese government wouldn&#x27;t talk openly about it.<p>Not specifically about postal subsidies, but indicative of the controversy &quot;proof&quot; would stir up:  <a href="https:&#x2F;&#x2F;ustr.gov&#x2F;about-us&#x2F;policy-offices&#x2F;press-office&#x2F;press-releases&#x2F;2015&#x2F;february&#x2F;united-states-launches-challenge" rel="nofollow">https:&#x2F;&#x2F;ustr.gov&#x2F;about-us&#x2F;policy-offices&#x2F;press-office&#x2F;press-...</a>