Changsheng: I Have Discount Coupons

Chen Lang traveled through the world of cultivating immortals and obtained a proficiency panel, as well as a coupon for discounts of ten points if he reached thirty. Every time the proficiency level reaches 30 points, the upper limit is automatically reduced by 10 points. Wind Bomb Technique (entry 0/200), proficiency reaches 30 → Wind Bomb Technique (entry 30/190) Relying on the full discount coupons, he avoids fighting and develops quietly, climbing up step by step. At the age of thirty... "Wait a minute, why is my age reduced to twenty?"