How to write the word 12 about the calligraphy of red history?

Promote cultural communication, red classics, our Yan 'an is a revolutionary holy land, the most simple and beautiful Yan 'an, which has remained unchanged from generation to generation and has a long history. It is the kindest, simplest and purest northern Shaanxi, with beautiful mountains and rivers, blue sky and white clouds, rolling rivers and towering Baota shan, the revolutionary holy land in our hearts and our beautiful green home!