Group 1 - The core question addressed is the annual cost of developing a WeChat Mini Program, with a detailed breakdown of expenses provided [1][4] - The annual fixed costs include WeChat certification fees, server costs, and domain fees, totaling approximately 2880 RMB for basic operations [4] - Development costs vary significantly, with template development costing between 1500-6000 RMB for a one-time payment, while SaaS models range from 3000-7000 RMB annually, and custom development can reach hundreds of thousands of RMB [5][9] Group 2 - Maintenance costs are essential for ongoing operations, with an estimated annual maintenance fee of around 2000 RMB for a custom Mini Program, while SaaS providers may include basic maintenance, reducing costs by 50% [7] - Cost optimization strategies include prioritizing SaaS or template development to avoid excessive customization, utilizing automation tools to lower maintenance costs, and leveraging public and private traffic to reduce user re-engagement costs [8] - The overall cost of developing a WeChat Mini Program is highly dependent on specific needs and operational strategies, with recommendations for startups to use template platforms for a budget of around 2000-6000 RMB annually [9]