1. Make a publicity plan: set clear goals and timetables. Determine the publicity methods and channels to promote Putonghua and book replacement, such as social media, advertisements, brochures, etc. Ensure that the promotion activities can reach the target audience.

2. Strengthen Putonghua education: cooperate with schools and educational institutions to promote Putonghua education on campus. Putonghua courses are offered to encourage students to communicate in Putonghua. Through lectures, competitions and other activities, cultivate students' interest in Putonghua and actively participate in it.

3. Establish a book exchange platform: Create a book exchange platform for people to share and exchange books. Provide a convenient and transparent exchange mechanism through online platforms or physical bookstores to attract more people to participate in book exchange.

4. Carry out publicity activities: organize publicity activities to promote Putonghua and book replacement. You can hold lectures, exhibitions, reading parties and other activities to let people know the importance of Putonghua and the benefits of changing books. Expand publicity influence through media reports and social media marketing.

5. Establish cooperative relationship: cooperate with relevant organizations and institutions to promote Putonghua and book replacement. Establish contact with libraries, schools, communities, etc. , support each other, * * * hold activities together, * * * promote together.

In short, the promotion of Putonghua and book replacement need to be based on education, and various publicity means and channels should be used to attract more people's participation and attention. It is also necessary to establish an effective communication platform and cooperative relationship, so that the promotion activities can last and have a positive impact.