Toronto-based Potash Ridge Corp., a junior potassium sulfate company, has announced a cooperative relationship with China’s Migao Corp, to assist in the development and operation of the corporation’s Valleyfield SOP in Quebec. Migao, which has 320,000 mt/y of SOP capacity across China, has agreed to provide technical, construction, commissioning, operations, and maintenance support services to Valleyfield for its planned 40,000 mt/y project. Migao will be responsible to procure equipment sourced in China and provide performance guarantees on all such equipment.