Product improvement strategy is also called "product re-launch" strategy, that is, a certain part of the product will be significantly changed in order to attract new customers and maintain the marketing strategy of old customers. According to the above definitions, Which of the following are not part of the product improvement strategy:. ['A TV station changed the hosting style of a show to increase ratings.', 'An electronic watch manufacturer turns the electronic watch movement on a necklace into a necklace electronic watch.', "A fashion magazine agency changed the magazine from quarterly to monthly according to readers' requirements.", 'A brand home power plant launched an air-conditioning trade-in event.']