The researchers studied how different ages of seedlings affect the quality and growth of Dianza 35 rice during wet-raised seedling. They found that transplanting the seedlings at 40-45 days old resulted in the best growth and development, with strong tiller ability, medium bearing period, high ripening rate, and high yield. Seedlings transplanted too young or too old did not grow well. The optimal age for transplanting Dianza 35 rice seedlings in Kunming is 40-45 days.