Facts about china in urdu /Hindi es video mein janiye mulakchina ke bare mein kuch ajeeb maloomat jo apko yakeenan maloom na hogi. The Chinese invented the earth’s first seismometer (earthquake detector) in 132 Advert, employing a significant bronze vessel with eight dragon’s heads that held bronze balls. In the http://safety-truck05050.tinyblogging.com/Little-Known-Facts-About-interesting-facts-about-china--9990228