lcsc.com. But keep in mind that their prices for Western companies ICs is often worse than DigiKey/Mouser. The passives and connectors are a lot cheaper.
I agree, the few times I've used LCSC it's been a perfectly fine experience.
But LCSC parametric search is worse, and their product photos and data are often wrong. Mouser/etc have decent parametric search which, for me, makes them the best place to find parts. LCSC has so much garbage data, a bad UI, multiple languages, etc. When I need a cheap, china specific part I usually just have to resort to manually searching through the 1,000 or so parts by hand. About as much fun as one imagines. And then their website starts throttling you for opening too many PDFs. SMH.