Quit Smoking: Optimizing Health Promotion Strategy

The goal of this factorial trail is to to optimize an intervention package to enhance quit attempt preparations, quit attempts, and tobacco abstinence among smokers without a plan to quit. The main questions it aims to answer are: * What are the main effects of the four intervention components for increasing quit attempt preparation? * Are there synergistic or antagonistic interactions between components? * Does chat-based instant message or chatbot enhance the effects of nicotine replacement therapy sampling and/or simple exercise education in increasing motivation to quit? * When participants experienced successful quitting by using the nicotine replacement therapy patch, will other tools, such as simple exercise education, chat-based instant messages, or chatbot, could help in the process and strengthen the effects of the nicotine replacement therapy patch and solve the possible problems they may encounter in using nicotine replacement therapy patch in a timely manner?