Ideas.
Well they’ve a few of those, including, papermaking, the compass, gunpowder, mechanical clocks, the abacus, rockets, pontoon bridges, paper money, writing, smallpox inoculation, porcelain, silk, matches, the civil service, landmines, cast iron, umbrellas, the crossbow, the parachute, canal locks, and printing.
And it looks as if they are still coming up with ideas. From a couple of weeks ago :
China poised to overhaul US as biggest publisher of scientific papers
“The Royal Society said that China was now second only to the US in terms of its share of the world’s scientific research papers written in English. The UK has been pushed into third place, with Germany, Japan, France and Canada following behind”