score:1
Wheelbarrow
According to "Needham, Volume 4, Part 2, 263-267", the wheelbarrow was an invention of the Hans chinese.
The earliest wheelbarrows with archaeological evidence in the form of a one-wheel cart come from second century Han Dynasty Emperor Hui's tomb murals and brick tomb reliefs.1
Link for photograph by Dadarot
Seismometer
A seismometer is an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions. According to "Dragons and toads: the Chinese seismoscope of BC. 132", from the Wikipedia link below, it was also another invention of the Hans Chinese.
The first seismometer was made in China during the 2nd century.9
Blast furnace
A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, and it is yet another Chinese invention dating to around 800BC, according to "The Earliest Use of Iron in China" by Donald B. Wagner.
Archaeological evidence shows that bloomeries appeared in China around 800 BC.