Is there any slogan about "Speak Mandarin and write standard Chinese characters"?

(1) The state promotes Mandarin, which is commonly used throughout the country

(2) Actively popularize the national synonyms and enhance the cohesion of the Chinese nation

(3) Love Flag, sing the national anthem, and speak Mandarin

(4) The four seas have the same sound, and we are united

(5) Mandarin: Chinese sound, Chinese love

(6) Popularize Mandarin , the world is one family

(7) Facing modernization, promoting Mandarin

(8) Actively popularizing Mandarin and working together to build a well-off society

(9) Establish language standards awareness and improve national cultural quality

(10) To promote Mandarin, civil servants should take the lead

(11) News media should become role models in promoting Mandarin

(12) Mandarin is our campus language

(13) I am a Chinese child and love to speak Mandarin

(14) Mandarin: the bond of emotion and the bridge of communication

(15) Speak Mandarin to welcome guests from all over the world; use civilized language to express true feelings

(16) Communication - start with Mandarin

(17) Speak Mandarin well and make it convenient You, me and him

(18) Speak Mandarin, start with me

(19) Speak Mandarin well, friends all over the world

(20) Mandarin, make You and I are getting closer

(21) Mandarin - the needs of the times, the pursuit of fashion

(22) Mandarin - making life more exciting and making society warmer

(23) Mandarin goes hand in hand with youth, and civilized language goes hand in hand with fashion

(24) Civilized language goes deep into the hearts of men, women, old and young, and Mandarin blends the feelings of the east, west, north and south

(25) Connecting with each other and speaking the same language, we can live happily together

(26) Achieve smooth communication and build a harmonious society