https://blog.artyomliou.ninja/2020/06/beacon-api%ef%bc%9a%e5%9c%a8%e7%b6%b2%e9%a0%81%e9%97%9c%e6%8e%89%e7%9a%84%e9%82%a3%e4%b8%80%e5%88%bb%e6%88%90%e5%8a%9f%e9%80%81%e5%87%baapi/