Why Baidu search several websites show their own external network IP inconsistency

Why Baidu Search a few websites show their own external network IP inconsistency?
Is the extranet IP not unique? Why do I search for Baidu, show their own IP inconsistency?
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The IP will be changed, everyone can put their own computer as WWW server
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This is related to the way the Internet, depending on what you signed with the network provider agreement
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You said if it is a home network, it will certainly change, if the server is generally assigned fixed IP, so I do not know what you are talking about network IP.
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ADSL disconnection, there is a certain chance to replace the IP
Mobile Wi-Fi may not be possible when you are online, and IP addresses are often roaming nationwide.

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