My opinion is that this should be written as... I don't want to go there; furthermore, I have no time to do so. or I don't want to go there. Furthermore, I have no time to do so. The key to knowing where commas should be places versus a semicolon is to remove the part between the commas and see if the sentence makes sense still. Doing that to the above yields: I don't want to go there I have no time to do so. This isn't correct, so placing commas around 'furthermore' is not correct. They are two distinct sentences, so I would put a semicolon and not a comma.

Exactly as Jeff has said: you've found a poorly-punctuated sentence. This sentence only exists on Chinese websites - that's a red flag for any English learner!

Can we join the two sentences with a comma？I think a coordinating conjunction such as “and”，“but” must be uesd in a compound sentence . I am really confused because what i think definitely wrong exists in a dictionary.

You're correct - so what are the commas for, do you think? ;)

Furthermore is a adverb,and furthermore if it were used as a conjuction i could not understand why it could surrounded by commas.