NORINCO SH15 self-propelled howitzers operational in Chinese army

A series of pictures published on a Chinese defense blog show SH15 self-propelled howitzers, equivalent to the French Nexter Caesar, apparently ferried by train and then deployed in Tibet, which would then indicate this SPH is now fully operational in the Chinese army.
NORINCO SH15 self-propelled howitzer displayed at Airshow China 2018 in Zhuhai (Picture source: Army Recognition)