The 'silly-looking' Soviet style headgear is actually preferred option for tank operators in PLA. They tried to introduce 'western style' helmet design over ten years ago. But, the feedback was not as convenient as the old Soviet style ones. The main reason is that in the summer it is much more comfortable to wear inside tanks. The old ones suited most of Chinese climate better. You may ask if it's the case why other countries in the west where the summer season is also quite humid and hot are not adapting the Soviet design. Well, I guess since they are used to their own gears there's no need to made any changes. Likewise, Chinese are used to their own style.
The German Bundeswehr, for once, is also traditionally using Soviet-styled headgear for their tank-crews.