OTA: Booking
Set Skyscanner country to United States and currency to USD. The prices shown on the calendar are cached and the actual price is cheaper. So far the cheapest I've found is on Booking. Departing 1/12 and returning 1/29 is the cheapest. Anyone who needs to travel to Asia can take a look.
Update:
This fare is no longer available. Tickets booked through Trip and Booking have already been issued.
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The key point here is that prices can change at any time. Since the fare is no longer available, this can only serve as a reference for a brief window; it would be best to add a note confirming the actual price once the ticket is issued.