1. Sales of semiconductor optical testing equipment. 2. Develop potential customers and expand the market. 3. Regularly visit distribution customers and maintain stable customer relationships. 4. Responsible for business promotion, order processing and product display, and handle matters related to account collection. 5. Plan international trade shows, participate in planning, and coordinate marketing activities (such as: exhibitions, advertisements, conferences). 6. Make a preliminary assessment of the contract proposed by the customer (transaction conditions, production process, product requirements, after-sales service), and seek assistance from other departments when necessary to respond to customer needs in a timely manner.