Gunpowder had already been invented in China but had not resulted in the sort of sophisticated military weaponry that the Europeans would develop from it.

CNN: Building On A Golden Age

Gunpowder may date back as far as the 4th century, when it was invented in China--perhaps by someone trying to mix sulfur, charcoal and saltpeter into medicine.

FORBES: Magazine Article

The compass was also invented in China, and records exist of how a great fleet was sent under the command of Admiral Zheng He in the early 15th century to show the Chinese imperial flag in the ports of the Indian Ocean and the Persian Gulf, a fleet said to be the largest seen in the world up to that time.

CNN: Building On A Golden Age

So we invented a new product in China called "Introduction to English".

BBC: Doing Business in China