United Airlines is celebrating Chinese New Year "Year of the Dog" with this: All routes from the U.S. to many cities in China and Hong Kong now offer two free checked bags, making your travels to Asia even easier. Plus fares are low. An example they're showing is PDX-PEK $454 roundtrip.
Flights to China [united.com]
Flights to Hong Kong [united.com]
Book by January 22
Travel starting between January 9 and February 16, 2018, or between April 2 and June 10, 2018.
Fare sale terms and conditions:
Tickets: Offer is valid for travel from mainland U.S. to China or Hong Kong. Tickets must be purchased on or before January 22, 2018. Roundtrip purchase required.
Travel Period: Outbound travel is valid between January 9 and February 16, 2018, or between April 2 and June 10, 2018.
Fare Validity: Fares are valid in the Economy (Coach) cabin on United/United Express carriers only.
Length of Stay: A 3-day minimum stay is required.
Blackout Dates: None.
Penalties: Changes requested after departure of originally scheduled flight are not permitted.