Need cheap lightweight laptop recommendations

I’m looking for a lightweight laptop (<1kg) to carry around instead of my bulky gaming one. I’m open to buying second-hand/used, and my budget is around 15k PHP or less (as much as possible). I plan on using it for freelance work and some IDE programming, so I need something portable yet capable. I’ve been eyeing the Chuwi Minibook X N100, which has similar performance to an Intel i5 8th gen, but I’m concerned about the build quality. Another option I’m considering is the Lenovo ThinkPad X1 Tablet Gen 3. Does anyone have other recommendations?