Highfield Resources Ltd (ASX:HFR) says China Minmetals and subsidiary Qinghai Salt Lake Industry will not proceed with the proposed strategic transaction under the May 2025 LOI. As a result, convertible notes issued to Potash (Muga) Investment, EMR Capital and others have matured, with EMR reserving rights while continuing discussions. The Implementation Agreement remains in place but is terminable by either party. Highfield reaffirmed its commitment to long-term shareholder value and will host a shareholder call on August 19, at 4.30 pm AEST.