https://buttondown.com/hawxchen/archive/hawx-chen-notes-cc40/2026-03-20monthlyhttps://buttondown.com/hawxchen/archive/hawx-chen-notes-6a47/2026-03-20monthlyhttps://buttondown.com/hawxchen/archive/u55e8-u6211-u7684-u8a02-u95b1-u7cfb-u7d71-u7d42/2026-03-20monthlyhttps://buttondown.com/hawxchen2026-02-12monthlyhttps://buttondown.com/hawxchen/archive/2026-02-12monthly