While the article provided is a comparison of B2B platforms Alibaba, Made-in-China, and 1688, it doesn’t focus on specific must-have clauses in supplier contracts for trade agreements. Generally, essential clauses in supplier contracts include Quality Assurance, Delivery Schedule, Payment Terms, Liability and Indemnity, Confidentiality, Dispute Resolution, and Termination Clauses. These elements are crucial as they help define the expectations and responsibilities between buyers and suppliers, ensuring clear terms and conditions are set to prevent possible disputes.