Xin ChenDeep-tech analysis, angel investing, and notes from both sides of the pitch.https://xinchen.io/en-usEvery Pitch Says AI. Here's What I Ask Insteadhttps://xinchen.io/blog/every-pitch-says-ai/https://xinchen.io/blog/every-pitch-says-ai/Every startup claims AI now, so the claim itself carries no information. Here are the four questions I actually ask before it earns any weight.Mon, 17 Aug 2026 00:00:00 GMTinvestingaistartupsscreeningWhat Technical Founders Often Get Wrong in Investor Pitcheshttps://xinchen.io/blog/technical-founders-investor-pitch-mistakes/https://xinchen.io/blog/technical-founders-investor-pitch-mistakes/Technical founders often lose the room proving their technology works. Investors want the market story: who pays, how much, and why the business can scale.Sun, 16 Aug 2026 00:00:00 GMTinvestingstartupsfundraisingInterconnect Is the Product: How AI Infrastructure Became a Networking Problemhttps://xinchen.io/blog/interconnect-is-the-product/https://xinchen.io/blog/interconnect-is-the-product/AI accelerators now spend much of their time idle, waiting on the fabric. That gap is why NVLink, UALink and Ultra Ethernet are fighting for the socket.Sat, 15 Aug 2026 00:00:00 GMTtechnologyai-infrastructurenetworkingSpace Stack: The Space Power Infrastructurehttps://xinchen.io/blog/space-stack-the-space-power-infrastructure/https://xinchen.io/blog/space-stack-the-space-power-infrastructure/Satellite power was perfected in isolation. Data centers, lunar bases, and wireless beaming are breaking that model. What to design before the window closes.Fri, 01 May 2026 00:00:00 GMTspacetechnologypower-infrastructure