公共资源网站XHR请求不到信息

公共资源网站XHR请求不到信息，不会抓
http://ggzy.huangshan.gov.cn/004/subSearch.html?categoryNum=004&pageIndex=11

url='http://ggzy.huangshan.gov.cn/EWB-FRONT/rest/webbuilderserverforHeFZTB/getinfolistnew'
求问Authorization这个动态密钥去哪里抓取
dic={
"Authorization": "Bearer 34ab84310eefc58a685a26b9629a7e58",
}
dat= {"params":json.dumps({"categorynum":"004","xiaqucode":"","title":"","startdate":"","enddate":"","siteguid":"7eb5f7f1-9041-43ad-8e13-8fcb82ea831a","pageSize":13,"pageIndex":29})}
resp=requests.post(url,headers=dic,data=dat)
print(resp.text)