python在post请求下爬取数据，为什么返回的只有一个空列表？

url='https://www.nudtdata.com.cn/getInfoByAreas2/'
headers={
    'Accept': '*/*',
    'Accept-Encoding': 'gzip, deflate, br',
    'Accept-Language': 'zh-CN,zh;q=0.9',
    'Connection': 'keep-alive',
    'Content-Length': '192',
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'Cookie': 'Hm_lvt_34468f2169a583fe54b48adaf05a94c6=1588511306,1588557588,1588755767,1588780421; Hm_lpvt_34468f2169a583fe54b48adaf05a94c6=1588819034',
    'Host': 'www.nudtdata.com.cn',
    'Origin': 'https://www.nudtdata.com.cn',
    'Referer': 'https://www.nudtdata.com.cn/',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.25 Safari/537.36 Core/1.70.3741.400 QQBrowser/10.5.3863.400',
    'X-Requested-With': 'XMLHttpRequest'}

data={
    'level': 3,
    'areas[0][]': 114.32761118774398,
    'areas[0][]': 114.31101050191958,
    'areas[0][]': 30.52845789078041,
    'areas[0][]': 30.512373872738657,
    'areaslength': 1
    'oldtime':2020-5-6}

r=requests.post(url=url,data=json.dumps(data),headers=headers)
print(r.text)

结果什么都没抓到，请问是什么问题呢？

我想要获得图中的信息，应该怎么做？

https://blog.csdn.net/weixin_42255200/article/details/80925328