It's actually a quite popular watercooling plan at the moment in China. Most people doing this were sending off their laptop to the vendor and have them install/mod the whole thing, it's not exactly a good idea to DIY/implement with no specific experience with vendor's own watercooling design, many things could go wrong.
The idea behind watercooling a laptop is mainly due to limited space in dormitory in Universities in China, kids just can't have a proper desktop rig to game on, while it's also true that having the mobility of a laptop is much needed for school. Hence besides the heatsink mod, there is also a special designed watercooling block to company the heatsink, which can suck out all cooling fluid from the heatsink when turning off/unplug. This way kids can just leave the watercooling block on their desk in dorm and take away their laptop, and plug back in when they are ready to game.
An example of the mentioned watercooling block can be seen here: https://item.taobao.com/item.htm?spm=a230r.1.14.28.2e17130ahxBsJE&id=607441657224&ns=1&abbucket=17#detail
I have also seen other cooler designs (no pun intended) of the watercooling block, there is one looks mostly identical to the VX gas in movie The Rock (1996) with green fluid.
So...Alex you should do some homework or ask Dennis/Andy to check Taobao first should you have anything weird from AliExpress next time
