1. To ensure the pure culture of bacteria, be careful not to use bacterial strains contaminated with bacteria. 2. Suitable cryopreservation strains, low-temperature strains such as Pleurotus ostreatus, mushrooms, etc., at 4 °C conducive to the preservation of the vitality of mycelium, high-temperature strains such as straw mushroom at 16 °C conducive to the preservation of the vitality of mycelium. 3. Avoid multiple passages in a single medium. Straws should not be used for long periods of time. Over ageing bacteria will appear to be aging, and aging and degradation are organically linked, and weakly viable strains are prone to degradation. 4. The bacteria must be rejuvenated regularly, and the rejuvenation should be carried out under the conditions of suitable temperature, suitable pH, sufficient oxygen, and no culture of bacteria. 5. Annual spore isolation, sexual reproduction to find good strains, and tissue separation to consolidate the genetic characteristics of the good strains. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com