Online group-buying is the use of the Internet to bring together scattered consumers with the same purchase intention and buy in large quantities from merchants to obtain the best price. The characteristics of online group buying are: there are restrictions on the number of transactions and transaction time, and high discounts It can make small payments and other features to realize the benefits of network organizers, consumers and producers. Which of the following are online group purchases? ['A company enjoys a 40% discount on ordering 500 pieces of cotton clothing online.', 'A shopping website solicits consumers who want to buy a brand of running shoes and places an order of 3,000 pairs with the manufacturer.', "An organization's online marketing shop purchases a brand product for a long time and members enjoy a 50% discount on the original price.", 'Xiao Wang contacted more than ten neighbors to purchase certain furniture to reduce shipping costs.']