beijing-signed-price-tracker

Track configured Beijing Housing Commission new-home projects from bjjs.zjw.beijing.gov.cn project-detail URLs, read project signed-unit counts, signed area, and average price, crawl building tables including “查看更多” and paginated lists, treat both “已签约” and “网上联机备案” as signed units, estimate the implied average price per m² of newly signed rooms from changes between the previous and current project summaries, cache unsold room metadata locally, persist rows into a Feishu spreadsheet as the single source of truth, and send Feishu DM notifications after each run. Use when asked to monitor one or more Beijing pre-sale projects, update a project mapping, sync newly signed rooms into a Feishu sheet, infer newly signed average price, verify duplicate insertion behavior, or notify on updates.