I know this thread is 6 years old....is anyone still there? Can I do an immediate (2 hour) turn from DTW-PEK-DTW? I assume I'll need to clear immigration and security both ways. DL188 arrives at 5pm and DL189 leaves at 7pm on Nov. 4th. US citizen with a Chinese visa, flying DeltaOne on the return which I hope gets me shorter lines. Thanks in advance for any thoughts.