One, SSL certificates


the reason for this problem is that SSL certificates are not secure
1. What about making a request in your code
Ex. :

import requests

url = "https://chinasoftinc.com/owa"
response = requests.get(url)

Return certificate error as below

Second, solutions
In order to make a normal request in the code, we modify to add a parameter

import requests

url = "https://12306.cn/mormhweb/"
response = requests.get(url, verify=False)