Useful. If the ticket dispatcher makes a delivery mistake or suffers losses due to his personal problems, he can complain to the customer service in official website, and the customer service will contact the ticket dispatcher as soon as possible to understand the situation after receiving the user's complaint. Complaints are useful. Pupu is a 30-minute instant delivery mobile Internet shopping platform. Categories include: fruits and vegetables, meat and poultry eggs and milk, grain and oil seasonings, beverages, snacks, personal care, cosmetics, cleaning products, daily necessities, etc.