China has only been disunited in times of Warring Periods and around 20 years after the Jin Dynasty. It was also disunited during the Great Jin dynasty.
India rulers have newer conquered the southern tip of India and mostly remain to the northern regions while Chinese rulers conquered most of the western portions (Tibet, Qinghai, and Xinjiang)
India broke up into more states than China and never really unified into one for a long period
Why is that the case?
Hey there,
Just to let you know, your question is fine, and we're letting it stand. However, you should be aware that questions framed as 'Why didn't X do Y' relatively often don't get an answer that meets our standards (in our experience as moderators). There are a few reasons for this. Firstly, it often can be difficult to prove the counterfactual: historians know much more about what happened than what might have happened. Secondly, 'why didn't X do Y' questions are sometimes phrased in an ahistorical way. It's worth remembering that people in the past couldn't see into the future, and they generally didn't have all the information we now have about their situations; things that look obvious now didn't necessarily look that way at the time.
If you end up not getting a response after a day or two, consider asking a new question focusing instead on why what happened did happen (rather than why what didn't happen didn't happen) - this kind of question is more likely to get a response in our experience. Hope this helps!