There is also an “efficiency factor” where if you exceed a threshold you get more.
The threshold is defined in the attachment here:
关于调整完善新能源汽车推广应用财政补贴政策的通知
It has different formulas for different weight, Model 3 SR with curb weight 1611kg falls in >1600 category. Where the formula is consumption per 100km is 0.0045*weight + 12.33 = 19.58 (kWh/100km)
Model 3 LR has 600+km range with 75kwh, translate to 12.5kwh/ 100km, beats the threshold by >35%.
SR with less weight should be even better. So they are eligible for 1.1x subsidy. Which would be 27.5k rmb.
Not that it would make much of difference, since Tesla is building GF3 for logistical efficiency and tariff avoidance, not for subsidies.
But, this rule was set to very much looks like only Tesla would take the most advantage of it.
Maybe they are just making sure only the best EVs would get the most subsidies and Tesla just happens to be making them.