In 1914 india has signed agreement with tibet government and got rights over some land , and during independence of India in 47 , a well drawn boundary got formed. Even if you claim it historically then why did you vacate the land which you won in 1962 war from india in Arunachal Pradesh ? You should have kept everything and after that you no need to ask for more but when war stopped and you seized 38,000 sq . Km land from india in aksai chin but after war you till kept demanding that Arunachal is yours and you need whole Arunachal and borde skrimish. A winner of war should not need to leave their the land which it had won but after leaving you still kept claiming, this is ridiculous.
It looks like you are still stuck in old era and want whole Arunachal Pradesh, and does salami slicing to earn few km of land even in latest 2020 conflict you earned some few km of land.
You have 4 lane road in your LAC side but stop india to build road in its LAC, you don't allow india to take loan for Arunachal devlopment from world bank.
All these things pushes india to counter you and make itself stronger or even make ties with someone who scares you and that is United States .
I don't think relationship between india and china will ever improve because most of the Chinese think tank and Chinese strageist look down on india and even they justify the Cpec road which china has built in disputed region of kashmir . China heavily supports pakistan by weapons to counter india and you say that we need to think of only devlopment wheareas xi jinping is telling that he won't give an inch of Chinese land and even renamed names of land in Arunachal Pradesh.
India never bothered much about your dispute with taiwan, hongkong, south china sea but your continuous obsession and claim over Arunachal Pradesh gives india no choice but to counter you .
Well india is also doing it's devlopment , it's slow but it's going forward , some companies from china has already shifted in india and some Chinese companies will go out from india.
Well you can try everything and if you want to take land of Arunachal through war then you can also try that but I don't think china has guts to start war with india but china already seems nervous with india when it's in indo Pacific.
and during independence of India in 47 , a well drawn boundary got formed
Again, don't make some callous statement without providing the document(s) that prove your claims.
I am reading that book written by an archivist/historian who work for your Indian government for 30 years and I even included that on the link for you to watch and read his book. But it seems that you're hell bent on telling a fictionalized history and perceived grievances against China depicting the country as an insatiable monster never satisfied on conquering lands. Such charge is fanciful and contradicts China's vast historical records.
Buddy, the modern state of India has had a head start from China ever since both countries established their modern day versions (47, 49). India has had the support of both the U.S. and Soviet Union. Allowed to take over Goa feom Portugal, using military means, whereas China incorporated Hong Kong with a f..d up arrangement of having ONE COUNTRY 2 systems, when in reality it was 2 COUNTRIES, 2 systems making the transition and integration of Hong Kong into China extra challenging and rebellion inducing culminating with the 2019 attempt at color revolution.
Taiwan is only a contentious issue due to the reneging and lies committed by the U.S. and Japan in handing back Taiwan to China (Please read the Cairo declaration) why do you think then ROC melted to the island of Formosa/Taiwan if it wasn't a part of China in the first place? And why would Japan take over Taiwan as part of their colonial prize in defeating China during the Sino-Japanese War of 1895 if it was not for China to give?
So, no the argument you're making (which is a grave mistake) that India must meddle into the affairs of China's core issues (historical legacy of imperialism and colonialism) as your counter attack against China is foolish, short sighted, and outright insulting. And it was not India's place to meddle into the territorial integrities of China to begin with. What an absurd logic and argument to be made in trying to justify Indian rationale against China. And no, China isn't scared of India, why would China be scared? You need to explain that part.
Funny thing though, when China was growing leaps and bounds economically (that's unprecedented in modern history) have you ever read from the leadership of China top or bottom, including their wealthy elites that China was on it's way to Supapowah status? Yes or No? As a matter of fact, the propaganda attack against China of today is that they have become wolf warrior like (as supposed to being the meekly China) doing away from Deng Xiaoping's "Hide your strength, bide your time."
There's a fundamental cultural difference between China and India. We don't brag and we don't make dumb ass promises or pronouncements that we are a super duper power. What Xi has expressed and his visions for the country such as MIC, dual circulation are the same concept and ideas that Modi have copied for your country but you know what's funny? China's intent no matter how noble and laudable will always be met with envy, scorn, doubt from you people. The attacks from the west are to be expected, but from India? The arrogance and know-it-all attitude smacks of misplaced arrogance which is rather sad.