A guest lecture titled “Indonesia–Bulgaria 69 Years Diplomatic Relations: Strengthening Diplomatic Ties in the Social Politics” was held on 10 October 2025 on the 8th floor of the Rectorate Building at Universitas Brawijaya. The event featured Madam Tanya from Bulgaria as the keynote speaker, who highlighted the long-standing diplomatic ties and opportunities for deeper collaboration between the two countries. Binamandiri attended the session as part of its commitment to broadening international cooperation. During a smaller follow-up discussion, Binamandiri representatives had the opportunity to engage in a more personal and focused dialogue with Madam Tanya, strengthening mutual understanding and fostering closer cooperation.