I come from Heilongjiang, but I can't answer all your questions. Because it's too general.
Objectively speaking, Heilongjiang is the largest poverty-stricken province in China.
But Mudanjiang is still a very rich city in Heilongjiang. Heilongjiang ranks third.
When you say that there is land and money, it should only be in the countryside. However, rural areas can only be allocated land if they have rural hukou. Moreover, the land is not divided every year, but every few years the state conducts statistics on birth diseases and deaths and redistributes the land.
Different villages have different land areas, and the allocated land areas are also different.
If you want to get married here, we are very welcome, because people in Heilongjiang are very simple.
The folk customs are very good. If you want to get married here, as long as you love your man, that's enough.
Other economic problems should not be a problem!