How was China discovered?

Gun powder, which they eventually used for rockets and use in cannons. Those are only three in a long list of Chinese discoveries.

The Four Great InventionsCompass 指南针(zhi3 nan2 zhen1) /司南(sīnán) ， 罗盘(luópán)

Gunpowder 火药(huo3 yao4)

Papermaking 造纸(zàozhǐ)

Printing 印刷术(yin4 shua1 shu4)