https://cn.vogon.today/%e5%8a%a0%e5%af%86%e8%b2%a8%e5%b9%a3/%e6%af%94%e7%89%b9%e5%b9%a3-stock-to-flow-%e6%a8%a1%e5%9e%8b%e5%9b%9e%e6%ad%b8%ef%bc%8c%e5%83%b9%e6%a0%bc%e9%a0%90%e6%b8%ac%e7%82%ba-532000-%e7%be%8e%e5%85%83/