Check your GPS at the border.
Cyranoski
David
D
D002681:China; D054242:Emigrants and Immigrants; D004784:Environmental Monitoring / Q000331:legislation & jurisprudence*; D040362:Geographic Information Systems / Q000295:instrumentation / Q000331:legislation & jurisprudence*; D005843:Geography; D012108:Research Personnel / Q000331:legislation & jurisprudence*