1. Product information consultation: We provide customers with detailed information about yarn and fabric, including material, color, specification, use, etc. by phone, email or online chat to help customers understand product features and functions.

2. Provide samples: When customers need some samples to test the quality of yarn and fabric, we will provide samples according to customers' needs to promote the transaction of orders. We can make individual customization according to the detailed information provided by the customer.

3. Professional advice: For customers in the selection of yarn and fabric questions and confusion, we will provide professional advice and opinions. We will recommend suitable product types and specifications according to customers' needs and uses to help customers make better purchasing decisions.

4. Price and offer information: We will provide the customer with the price of the product and any promotional information. We can answer customers' questions about prices, introduce discounts and preferential policies, etc., to help customers find the most suitable purchase plan.

In general, the product pre-sale service aims to help customers make satisfactory purchase decisions by providing customers with detailed product information, product display and demonstration, professional advice and price and preferential information, and ensure that they get good after-sales support after purchase.