I saw this posted on Twitter today: https://mobile.twitter.com/taresky/status/115938806298554777...
The keyword is "PD 诱骗头", which is a small converter to trick the power supply to output at full capacity. Not sure if it's safe, but it's tempting to replace the big power adapter that comes with NUC with a small GaN USB C PD adapter.
Edit: a link to this kind of "PD 诱骗头" http://www.chongdiantou.com/wp/archives/10456.html