The intelligence China collected was mostly from electronic signals, which can be picked up from weapons systems or include communications from base personnel.
Ukraine is kicking Russian ass at present. Now it appears that Russia will need to rethink its position that Russia is safe from the carnage they have unleashed in Ukraine. Next targets are in Moscow.
No, Putin's support isn't hardening. This is total disinformation. In fact, Putin is scrambling to stay in power, fearing he'll be removed soon if he doesn't show success.