I just learned that for people with US PR working in China and pay income tax at China, when they take business trip to US, income during the time (trip) is taken as US income (from IRS perspective) and paid China tax can not be taken as credit. Therefore, for this period, the income will be subject to both China and US tax without tax credit. How do people usually go about this? This is double taxation where tax credit doesn't apply.

Any advise/insight?