Questions are as follows:
Reason : This is because the user password of the remote system is empty, and only local accounts with empty passwords are allowed to log in to the console.
Solution:
1. Use win徽标+R
Enter in the remote system to secpol.msc
open the "Local Security Policy".
2. Select one by one 本地策略 -> 安全选项
, and set the帐户: 使用空白密码的本地帐户只允许进行控制台登录改为禁用。