Cut it off. Penglai pine needs enough water to grow. Don't water too much to avoid water accumulation and root rot. Water once a day in summer to avoid rapid evaporation of water and dry soil. Reduce the amount of watering in autumn and winter, and water every 7- 10 day. Bundle the branches of Penglai pine that grow too fast and too long and trim them. Ensure the good shape of plants, unify the length and height of all branches, and increase their ornamental value.