If we are talking really about War with China- then those 120MM Rockets @40-Km or 220MM Rockets @80-90 Km are useless. Because how exactly are we gonna use them?
Thinking about PLAGF Armor or troops on ground before even thinking about PLARF, PLAAF and PLA SAM is useless. The Skirmish/Battle with China would not be some mobilization as we see like those in conventional war where we field armored regiments and such. It would be something akin to what happened in Operation Sindoor. So, in such view, these short range rockets are useless. We
need MASS to strike PLAAF bases first and later we can think about PLAGF brigades. No one can't mobilize their ground forces without air denial atleast.
Those 370-MM Rockets are also largely useless in a sense that they are not that accurate. Any effort at "Accurate-fying" those Rockets will lead to inevitable Missile.
What we need is Small Solid Fuel Ramjet Missile like

-Mini at 300-400Km @1.5-Tons and another larger heavier one like a beefed up

-Heavy at 1000-1200km @3.5-Tons.
Iam also skeptical of Terrain hugging Cruise Missiles like ITCM because the enviroment of High Altitude Himalayas would not make it feasible. Morever ITCM is not even stealthy one, once detected even an AA-Gun can take it down.
What we need is
1. Shahed like Drones with 1000+km Range
2.

-Mini @1.5-Ton, 300-400km Range
3.

-Heavy @3.5-Ton, 1000-1200km Range
and Nothing else. We should focus on these and do mass production, the more we add to zoo the more would be cost of each unit and non standardization. All those talks of long range MLRS is jhumla because they lack accuracy. Haven't we seen

striking at Pakistan Hangar? Can Rockets do that?