在网上看到这样一条singbox规则 
{"tag": "🇭🇰 香港自动", "type": "urltest", "outbounds": ["{all}"], "filter": [{"action": "include", "keywords": ["🇭🇰|HK|hk|香港|港|HongKong"]}, {"action": "exclude", "keywords": ["免费"]}],"interval": "10m", "tolerance": 100}

（规则来自于rule/config/singbox/1.12.x/config.json at main · qichiyuhub/rule · GitHub ） 
有点类似于clash系的 
- {name: 美国自动, type: url-test, use: [amyproxy], tolerance: 20, int...