On November 6, Optotech Technology announced that its controlled subsidiary, Guangdong Xianrui Technology Co., Ltd., has signed a long-term supply intent agreement with Coherent Corp. Under the agreement, from 2027 to 2029, Xianrui Technology will supply 6-inch indium phosphide substrates to Coherent Corp.'s facilities in Switzerland and Sweden, with an estimated transaction value of no less than US$601 million.