2. Yes.
You can't just provide the address, but also ask him to send you an invitation. As for the problem of immigration tendency, it is generally not short-term, but it is more dangerous if you sign a short-term maximum period. So if those days are good, I suggest you sign for 80 days, which is safer.
As for the visa time, in fact, visas are very fast now, especially short-term visas for visiting relatives and friends, but the materials must be prepared and will not delay time. But then again, it is the end of July. I suggest you make an appointment as early as possible (usually one week in advance), prepare all the materials while waiting, and then wait about 1 week to get the visa. Let me help you figure it out. If he hasn't sent you an invitation, it will take him two weeks to send it to you, plus one week to wait for the visa. It may take around August 20th, but the time is a bit tight ~!
At present, the general travel agency will not sign it for you, because if you do your own activities and don't come back after the deadline, they will be responsible. Even if individual travel agencies sign on their behalf, it will be more troublesome and not recommended.
Ps: Don't say you're going there to get married, just say you're going to see your boyfriend, or you're going to play, which will be easier to pass. If you say you're getting married, you're in trouble!
Good luck!
Supplement: He can open the invitation by himself. Anyway, there is a copy at the visa office, but if they want to see the original, they still advise him to send it, which is safer and saves you the trouble of calling back and re-signing.
Visiting relatives and friends, you don't need to show your ticket documents, but you need to travel.
The insurance problem can be dealt with when you go to the insurance company. They will know whether you have applied for visa insurance, but you should tell them the date and date of insurance, because the price is different.
If you have any questions, send me a message.