No, that isn’t a clarification. You’re not understanding that the birth rates in the rest of China were already much lower prior to the 10% decrease. The Uighur population has been growing even as the Han population has leveled out, because the Han already had lower birth rates for decades. The Uighur were exempted from the one child policy as well. So yeah, the rest decreased 10%, there was less room to decrease in the first place because birth rates were already very low!