Abotani is either facetious or misinformed.
Chinese supported and continue to support the insurgency in NE although indirectly.
In 1960s the NE insurgency was at its peak, Chinese supported through then East Pakistan. As geographically is was difficult to provide support.
After 1971 the support reduced massively.
Post the death of Mao in 1976 the support further reduced, since several Left wing insurgencies support by China was dropped.
Current support is limited to Arms provided through Burma and Thailand. However Thailand is cooperative with India on this matter.
Its in China's best interests to have NE underdeveloped, as cases like Abotani will seek integration with China more and more by witnessing the developmental gap.
Indeed my friend, whatever you say