Pray for an early arrival. My last flt from PVG arrived SFO at 0815 and immigration was totally empty. Wow we flew through the whole process and hopped an earlier domestic leg. Warning, if you suspect you can jump an earlier flt, do NOT recheck your bags, but drag them to the lobby and hit an elite line to try to catch an earlier flt. Has worked for me 2x this year. YMMV. IF you are carry-on only, no sweat....