BRICS nations (Brazil, Russia, India, China and South Africa), began in 2001 (South Africa was oddly added in 2010), purportedly representing the fastest emerging economies. BRICS has developed its own development bank and various forms of financial cooperation. They are also constructing a private telecommunications undersea cable network.
The Shanghai Cooperation Organisation (SCO) also began in 2001 with six original members (China, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan). In 2017 they were joined by Pakistan and India, which means it covers 40% of the world’s population.
They cooperate economically and militarily. Keep in mind that India cleverly has a policy to be friends with everyone, so they are not expected to be loyal to anything.
The North South Transportation Corridor (NSTC) is a 7,200-km-long multi-mode network of ship, rail, and road route for moving freight between India, Iran, Azerbaijan, Russia, Central Asia and Europe. Other routes under consideration include via Kazakhstan and Turkmenistan.
While the routes are intended to increase international trade efficiency, they are also a private network if borders were closed to western nations.
Eurasian Economic Union. This organisation was formalized in 2015 and incorporates Armenia, Belarus, Kazakhstan, Kyrgyzstan and Russia, with Iran signing a free trade agreement in 2018.
Any or all of the above could be factors in an East/West schism.