C173 She Has Always Been in an Extremely Passive Position

Yu Xiaotong was very confused. She had never heard of Rock Bee Sugar, and she did not know what special treatment this Rock Bee Sugar had for asthma. So now even if she knew that these seemingly fertile black mud blocks were not real soil, Even if she already knew that this thing was good, she could not explain its pharmacology clearly.

Yu Hongbin asked, "Xiaotong