1. Check in and ask the airline agent to print out both boarding passes
2. Confirms all checked baggage destination is not SFO, but your final destination.
3. Enjoy a trip to SFO
4. Arrive US and go through "Custom & Passport Check"
5. Confirms the baggage claim conveyor number and go pick up the baggage
6. Don't exit to the ground transportation and look for "Exit For Connecting Flights"
7. Re-check(Drop) your baggage at the Connecting Baggage Desk
8. Go through the security check once again
9. Locate your gate and enjoy the rest of your domestic trip