Inventions timeline
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* 3500B.C.  Lacquer  in use
* 3400B.C.
* 3300B.C.
* 3200B.C.
* 3100B.C.
* 3000B.C.
* 2900B.C. Invention of the  fast potter's wheel. 
* 2800B.C.
* 2700B.C.
* 2600B.C.
* 2500B.C.
* 2400B.C.
* 2300B.C.
* 2200B.C.
* 2100B.C.
* 2000B.C.
* 1900B.C.
* 1800B.C.
* 1700B.C.
* 1600B.C.
* 1500B.C.
* 1400B.C.
* 1300B.C.
* 1200B.C. Evidence of writing 
* 1100B.C.
* 1000B.C.
* 900B.C.
* 800B.C.
* 700B.C.
* 600B.C. First mention of  iron casting 
* 500B.C.
* 400B.C.   Magnetic compass is developed
* 300B.C.
* 200B.C.  Manufacture of steel from cast iron
  Paper is first produced
* 100B.C.   Wheelbarrows are invented and used
* 0A.D. First mention of  hydraulic power used in the bellows of blast furnaces for casting iron
* 100A.D. Cai Lun presents the emperor with the first kinds of paper produced from hemp and tree bark
Zhang Heng's  armillary sphere 
 Earthquake detector invented
* 200A.D.
* 300A.D.
* 400A.D.
* 500A.D.
* 600A.D.
* 700A.D.  Gunpowder discovered
* 800A.D. Earliest surviving dated Chinese book  printed by the wood block process
* 900A.D. First  canal lock 
* 1000A.D.
* 1100A.D.
* 1200A.D.
* 1300A.D.
* 1400A.D.
* 1500A.D.
* 1600A.D.
* 1700A.D.
* 1800A.D.
* 1900A.D.
* 2000A.D.