CPU only but together with other computer stuff too.
I googled a bit and seems some third party agent claims any item with electronic chipset already considered sensitive.
But in my experience, I've bought quite many items with electronic chipset,
let me share my experiences (I only listed down those has electronic chipset):
1st time: surface pro keyboard (type cover), laptop keyboard (spare part), usb hub (with ethernet port), 2cm micro fan (I saw an agent website said fan is sensitive)
2nd time: bluetooth dongles, bluetooth keyboard (I'm surprised this passed because it contains battery actually), RJ45 tester, mini-dp converter
3rd time: processor, DP converter, tons of lighting cable
4th time: usb converter, car charger, hdmi converter, card reader
and I think there's one more time in between but somehow I can't find the history of that.
All of them I just bought like normal, nothing special operation.
I just follow one guideline, don't buy anything that contains battery (or ask the seller remove it if possible).
And if you use official shipping agent, if agent really think your item is sensitive item, they won't ship it (you have to return item and refund).
Price you have to refer to official shipping agent price (usually 1st kg around ~RMB23)
Then again maybe I was just really lucky??
