each see each other as a threat. there’s disputes on various territories across the 4k km himalayan border for one. both countries fought a war in the 1970s around these disputes and, by all reliable accounts, it was india that ceded territory then.
separately, india has provided sanctuary to the current dalai lama for many, many years now and also is a refugee base for tibetans, which mr. xi and his folks don’t appreciate.
india has also banned tiktok since its inception as well as access to alibaba and other online chinese stores.
china’s relationship with indian neighbours is seen as a threat as well, be it of a strategic nature such as their belt and road initiative with pakistan, their predatory relationship over sri lanka after drowning them with easy loans, or their latest “coup” in the maldives where the long-standing india-friendly government lost out in the last elections to a party that campaigned on “india out” and who were very pally with winnie the pooh and gang.
the geopolitical relationship is stereotypical of two neighbours who hate each other so much that each would go out of their way to torment the other.