I just found some interesting article about the development of Chinese tanks and i tried to translate them. But because of my poor translation skill , i just translated the HT part and i tried to avoid the unnecessary parts.
In early 1950s ,soviet IS2 tanks were exported China , PLA were impressed by it's excellent firepower and protection.So the initial heavy tank development program of China was be based on IS2. Some factory with rich experience in repairing IS2 proposed the 110 project , it was based on the IS2 tank with reinforced frontal hull with a plate configuration resembling that of the IS3 and a well sloped and better protected new turret . But the 122mm D25t gun on IS2 didn't meet the need of PLA in late 1950s and the research of new 122mm gun wasn't finished ,so the project was paused.
In early 1960s, PLA decided to make a new heavy tank which is able to fight against soviet T10 and US m103. Two projects were proposed , 111 and 112 , and PLA decided to develop the 111 project and the tank was renamed as WZ111.(well... There’s a sentence i really don’t know how to translate : “111采用负重轮加拖带轮,箭矢首上设计。112采用大直径负重轮,无拖带轮(似乎采用常规首上)” it’s about the differences of suspension and frontal armor on 111 and 112 ) , WZ111 was planned to use a 720HP engine in order to get a speed limit at 45~50km/h and a new 122mm gun , a prototype of WZ111 wan produced in 1960 ,but the research of 720HP engine and the turret was not finished ,so the prototype only got a 520HP engine and a fake turret to test the suspension . The design of WZ111 totally improved 5 times so there is 6 models of the tank ,they have different frontal armor and suspension . (I don’t think WG can show the differences between these models ,and.......where is the 6th model ? Even in 8.2 patch there’s only model 1~4 and 5A . The premium WZ111 is the 6th one? ) In late 1960s WZ111 was discontinued because of the problem of technology and the development of main battle tank.
113 is probably the last HT project PLA developed ,while many people think it’s a main battle tank instead of a heavy tank .113 was based on the improved version of 112 and combined with the technology of type 59(suspension and the location of the engine) and WZ111 ,113 got a more compact chassis comparing to WZ111 and mobility was greatly improved, chinese engineers plan to mount the 130mm type 59 field gun on the tank .(it’s weird that in the real history ,the WZ111 mounts a 122mm gun and 113 mounts the 130mm gun while in the game 111 got the 130mm gun and 113 got the 122mm gun ) (AND another sentence about suspension i dont know how translate,sorry :113负重轮也终于做到了一边6个,并且采用了59的大直径负重轮无托带轮设计)
As for the HT branch of Chinese tech tree i suggest to put WZ111 5A on the end of WZ111 branch ,and made a new 113 branch (because there’s little connection between WZ111 and 113 ,and I really want WZ111 5A return to the game simply because 113 looks ugly )
WZ-111 branch (or “pike nose” branch): 110-----WZ111 1-4-------WZ 111 5A
113 branch: 110----112 model B -----113
(in fact i really want to put 112 on the place of 110 because 112 and 113 have normal upper plate while 110 have “pike nose ” upper plate ,some Chinese player suggest to put a tank called “110 2/130” on the place of 110 in 113 branch but i don’t get much information about he tank :it is another design for 110 project , basically a IS2 with thicker and well sloped frontal armor。But why do they call them 110-2/130 ? It mounts a 130mm gun ?)