Differentiated competition: In the short-term fierce competition, multiple companies in the same industry use flexible and changeable personalization methods to establish a good corporate image and win market operation methods. Which of the following are differentiated competitions:. ['During the Spring Festival, several major online short video platforms have launched red envelope grabs. You posted 500 million, and he posted 800 million. The competition has become fierce.', 'Under the condition that other real estate developers have reduced their prices, a certain property has improved the quality of the property, introduced the resources of famous schools, and its sales have been far ahead of other properties in the same period.', 'Whenever the festival is celebrated, several large electrical appliance malls in the urban area will offer preferential activities such as giving away small appliances and extending the warranty period. Citizens often wait until then.', 'Under the general slump of physical bookstores, a bookstore located in a prosperous neighborhood has always maintained its market positioning and is committed to selling high-quality professional books in order to local cultural landmarks.']