Well, an obvious effect is the lack of a Communist China, or at least an extremely weakened Chinese Communist Party which will never really get as far as it did in OTL.
I imagine the Chinese might manage to hold onto Manchuria, let alone managing to resist the Japanese.
While the timeline of the restoration, I think, makes it too far along for China to keep a hold of Korea, I imagine there might be some incident where China and Japan struggle for control of the Korean peninsula. Might make for an interesting war.
I think that China, in a stronger state, might join up with the Central Powers in World War I, in order to take on Japan.
The fronts that would be fought in that war would make for an interesting story...
The Russian Front.
The Indian Front.
The Indochina Front.
The Polynesia Front.
And, of course, The Japanese Front.
A strong China's entrance into WWI on the side of the Central Powers could, obviously, drastically alter the course of the war. A couple hundred thousand American doughboys are nothing compared to a couple million screaming Chinamen.
I can see Russia giving up large portions of Siberia, especially the region south of the Amur River, to China, and possibly Central Asia as well.
I can see Sakhalin and possibly Hokkaido islands given up to China from Japan.
I can see French Indochina given to China.
I can see Siam annexed, possibly.
I can see Burma given to China, possibly Nepal and Bhutan, but certainly not India nor Pakistan. I doubt anyone would be stupid enough to try to administrate that while already administrating all that.
I imagine, however, that China might demand the Independence of India and possibly Pakistan.
On that note, they might just demand the independence of Central Asian countries, rather than out-right taking them from Russia, the same applying to French Indochina, and a Sphere of Interest in Siam rather than annexation.
I can see Singapore handed over to China though, and possibly given either to Chinese controlled Siam, or given independence.
The same independence idea applies to the Philippines (Assuming the USA enters a drastically different war) and Borneo, as well.
This is, of course, completely disregarding the fact that Germany might be inclined to take these colonial possessions as her own. However, I would think that Germany might acknowledge China's assistance in the war, and might grant her some favors in the peace treaty.
Hmm... I might start writing this, actually.