1. Understand the store's reputation: You can check the store's reviews, reputation and customer feedback online to understand the store's service quality, after-sales service and product quality.

2. Understand the store’s qualifications: You can check the store’s qualification certificate and related information to find out whether the store has a formal business license and related certificates.

3. On-site inspection of the store: You can go to the store for an on-site inspection to observe the store's business environment, product display, clerk service, etc., in order to have a more comprehensive understanding of the actual situation of the store.

4. Understand product quality: You can understand the brand, production process, materials, etc. of the guzheng sold by the store, so that you can choose products that meet your needs.

5. Understand the after-sales service: You can understand the store's after-sales service policy and service quality, so that you can get timely and professional help when repairs or maintenance are needed.