China has little toys with nuclear propulsions that can submerge under water, those are not SSNs. Their actual SSNs are still in the works. In any case, it's about the numbers, not just having the tech.
Nothing's been settled between Russia and China. Whatever they have right now is only a temporary arrangement. The Russians are pretty pissed at China over Tajikistan. These guys just don't speak about their problems publicly. But the problems are bigger than the ones between India and China. Right now, China's first priority is either Taiwan or India, we don't know which. Then there's SCS, Japan and Russia.
China's official targets:
On July 8, 2013, the pro-PRC Chinese-language newspaper, Wenweipo, published an article titled “中國未來50年裡必打的六場戰爭 (Six Wars China Is Sure to Fight In the Next
www.indiandefencereview.com
Russia understands India's "neutrality" vis-a-vis China and the US. India is neutral because India doesn't want to be the West's poodle. Our main concern is our economy, until we become big enough to become our own side. In a multipolar world led by the US, China, India and Russia, India plans to be friends with both the US and Russia.