(you said europeans used a compass a very long time before chinese have stated). i tell u chinese invented compass around 100 AD, so you can stop bullshxt and go to sleep big liarjust before i go i will answer this.. i NEVER SAID europeans had the compass in 500AD - 600AD
i said they had the compass 400 odd years BEFORE COLOMBUS and before it was COMMONLY USED..
your lack intelligence, seriously.. go back to school for 40 years, you might actually understand english then, and be able to debate without stupidity