April 20th News: On April 20th, Guizhou Xinqiang's yellow phosphorus plant underwent maintenance, which is expected to last 3-5 days. Chempricehub Analysis of Yellow Phosphorus, Bull-Bear Score: 1. The maintenance of Guizhou Xinqiang's yellow phosphorus plant is expected to last 3-5 days, which will lead to a short-term reduction in yellow phosphorus supply, providing favorable support for spot prices. The supply contraction may drive up market quotations, but the maintenance period is relatively short, limiting the extent of the impact. Therefore, it is rated as a moderate positive (+1).