A Boeing 747-400 with strange livery... Later it revealed that this aircraft is operating for United Charter! Rare to see United Charter aircraft at PEK, maybe this one was here just for maintenance at Ameco Beijing.
<a href="//commons.wikimedia.org/wiki/User:N509FZ" title="User:N509FZ">N509FZ</a>
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<span class="int-own-work" lang="en">Own work</span>