The December 9th Movement was the anti-Japanese and national salvation struggle carried out by students under the leadership of the Communist Party of China.

As long as the calligraphy work fits the theme.

You can refer to these slogans of the December 9th Movement:

"Long live the Chinese nation!"

"Strive for the freedom of the motherland!"

"Down with Japanese imperialism"

"The whole country should arm itself to defend North China."

"Oppose the anti-Japanese autonomy movement!"

"Oppose the traitorous foreign policy!"

"Stop the civil war immediately!"

"Declare war on Japan immediately!"

"People! Arm yourselves!"

"Protect North China with force!"

"Down with the traitors!"

"Down with the traitor Yin Rugeng!"

Personally, I think the first two are better, but the following are mostly limited to the background of the time, and are incompatible with the feeling of calligraphy....