The key window for direction selection is mid to late May. At that time, the reduction effect of maintenance will be concentrated, and the impact of export reflux will gradually be digested. If the reduction in maintenance can effectively offset the increase in reflux, coupled with the demand inertia brought by post holiday replenishment, the market is expected to usher in a small corrective rise; On the contrary, if the demand side continues to weaken, prices may remain in the current stalemate. But before the sulfur price substantially falls, the pattern of Shandong sulfuric acid's "quantity increase without increase" is difficult to break. The market needs patience - whether it's buyers or sellers, what they can do now may just be waiting for the straw that breaks the balance in the cracks of "difficult to rise and difficult to fall".