The same 1688 member account and time can only log in one Wangwang.
If you have two WangWang programs open on your computer to log in to the same membership account, or someone else knows your password and logs in from somewhere else, it may appear.
If you have logged in two, you are advised to log out of one. If not, you are advised to ask the colleague who knows the password of the member account whether to log in. Meanwhile, you are advised to set the password to a complex one to ensure the security of your account.
Tip: if not for the above reasons, your member account may be stolen, please immediately change the password, and pay attention to your own computer network security.