Answered by ZUPAN | Aug. 21, 2019 08:55
OK, you intend to make Macau your base, but you would like to visit Zhuhai city for more than 3 days, right? In that case, you need a Chinese tourist (L) visa obtained in advance because Zhuhai VOA is valid for 3 days only. In reality, it is valid for 4 days, but just 3 overnights because the beginning of visa validity is from the next day of your arrival. If you arrive at the border crossing in the morning, that whole day is not considered to be one of the 3 days you are allowed to stay in Zhuhai.
If you consider the obtaining of the Chinese visa too much hassle, you can exit Zhuhai after 3 days to Macau and enter again for new 3 days. I understand that you are probably thinking about the expenses, but for German citizens, the price is 168 CNY and I consider it quite affordable. Now, when you know your options, it's up to you to decide.