Excuse me, do I have to have A 1 certificate to apply for family reunion in Germany? None of us study German in this place.

This is necessary now, unless you have a bachelor's degree certificate and A 1 level of spoken German, the visa officer will not want this certificate, otherwise you must take the exam, and you are from Goethe Institute. Time depends on the speed of the German foreign exchange administration. In fact, the most important criteria they measure are your spouse's income and your personal situation. If your spouse has a stable job in Germany, your experience in China proves that you have certain qualities. You will get a visa within one month, but you will be given time to enter the country after three months. If the spouse's income is not enough, then don't give it. If there are any questions, they will also be called to ask questions. As for German, the embassy doesn't care if there are German classes where you live. Their principle is simple. Bring A 1 if you want to start a family group, and don't sign it if you don't want to.