Now, the chinese spend the 16th century improving their economy, restructuring their internal policies (chinese councillors advised that the army should be offensive and it's quality high, that naval expansion should be paramount, innovation encouraged, the aristocracy empowered, centralization increased, and the trade as free as the citizens)
They also spent their time making war, the first war, against the Mughal-Assamite-Bengal Alliance dragged on for many years, although the Assamites and Bengalis were quickly routed by superior chinese technology the Mughals and their monarch Akbar proved a much tougher nut to crack, finally however they too were defeated and forced to the negotiating table, all of these three states were forced to acknowledge chinese superiority.
The second important war (prompted by the chinese hidden alien advisors) led to Atjeh being forced to acknowledge chinese superiority.
At this time also the Great Improvements began, at least 10 refineries had een built, many of them due to unexpected inventions, the entire country (more or less) had also been improved in other ways, legal counsels and governors were nowadays present in all chinese provinces.
A side effect of the chinese advantage in technology was the rise of the moslem nations in power and influence, with greater proximity to china they profited greatly from their gigantic neighbour, making nations such as Gujarat and the Mamluks leader in technology before such laggards as France and Austria.
Of course, this did not preclude China from expanding their Manchurian colonies, to great expense the colonies north of Manchuria were expanded to the status of cities.
Some time during the second decade of the 17th century the Chinese made yet another brave expidition, this time to the Yonglian continent, at first they had planned to annex the vast Aztec Empire, but someone commented that since no missionaries were present they would have to share their time with Heathens, disappointed the Son of Heaven decided to simply convert the top-layer of aztec society to the Confucian philosophy.
In 1617 a manchu chieftain by the name of Nurachi attemtped to rebel against the Emperor of China, the emperor of course refused to leave his manchu citizens to the depredations of Nurhachi and ordered the army to restore order, great unrest was caused by this all over the country.
Even greater unrest was caused by the deadly Cult of the White Lotus, the emperor however, dispatched his troops to crush this insurgency as well.
At the same time as the White Lotus rebellion new colonies were founded on the Yonglian continent, also, the aztecs were brought under chinese vassaldom.
Despite the continous activity of the White Lotus cult the Empire's finances remained sound, thus the Emperor declared that no new taxes would be raised in 1640, the decision was hailed with great glee all across the Empire.
All hell broke loose in 1644, when the madman Li Cheng took the capital, the emperor committed suicide, something that plunged the Empire into total chaos, war and destruction ravaged the lands, and in the turmoil the Manchu declared their independence. Woe was upon the chinese indeed!