Russian cherry no.8 and crystal. According to the personal library, mating between different varieties of cherry trees can increase population diversity and fruit yield, but it is necessary to ensure that varieties can pollinate each other. Russian cherry No.8, Meizao and Crystal can pollinate each other. All three varieties are sweet cherries, and all cherry varieties need pollen transfer to bear fruit. The pollen characteristics of these three varieties are slightly different, but they can all bloom in the same season, so Meizao, Oba cherry and Crystal can pollinate each other.