What format is this? Is it a picture or a file?

A link like this, http://parse.a.cn/parse/files., is used in the picture:

<img src="http://parse.a.cn/parse/files/1346a5839b91b5325e2ecec7c67ef975/086631de48a500600d1953e95b0ed695_file"/>

then a picture is displayed.
has no suffix. What format is this? Papers? So how do I turn it into a picture and right-click to save it?

Aug.12,2021

look directly at what http response is. Only one link, no one knows what it is

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