For a writer, especially one who aspires to bear witness to what is happening in China, freedom of speech and publication mean more than life itself. My good friend, the Nobel laureate Liu Xiaobo, has paid a hefty price for his writings and political activism. I did not want to follow his path. I had no intention of going back to prison. I was also unwilling to be treated as a “symbol of freedom” by people outside the tall prison walls.

Only by escaping this colossal and invisible prison called China could I write and publish freely. I have the responsibility to let the world know about the real China hidden behind the illusion of an economic boom — a China indifferent to ordinary people’s simmering resentment.

I kept my plan to myself. I didn’t follow my usual routine of asking my police handlers for permission. Instead, I packed some clothes, my Chinese flute, a Tibetan singing bowl and two of my prized books, “The Records of the Grand Historian” and the “I Ching.” Then I left home while the police were not watching, and traveled to Yunnan. Even though it was sweltering there, I felt like a rat in winter, lying still to save my energy. I spent most of my time with street people. I knew that if I dug around, I could eventually find an exit.

WITH my passport and valid visas from Germany, the United States and Vietnam, I began to move. I shut off my cellphone after making brief contacts with my friends in the West, who had collaborated on the plan. Several days later, I reached a small border town, where I could see Vietnam across a fast-flowing river. My local helper said I could pay someone to secretly ferry me across, but I declined. I had a valid passport. I chose to leave through the border checkpoint on the bridge.

Before the escape, my helper had put me up at a hotel near the border. Amid intermittent showers, I floated in and out of dreams and awoke nervously to the sound of a knock on the door, only to see a prostitute shivering in the rain and asking for shelter. Although sympathetic, I was in no position to help.

At 10 a.m. on July 2, I walked 100 yards to the border post, fully prepared for the worst, but a miracle occurred. The officer checked my papers, stared at me momentarily and then stamped my passport. Without stopping, I traveled to Hanoi and boarded a flight to Poland and then to Germany. As I walked out of Tegel airport in Berlin on the morning of July 6, my German editor, Peter Sillem, greeted me. “My God, my God,” he exclaimed. He was deeply moved and could not believe that I was actually in Germany. Outside the airport, the air was fresh and I felt free.

After I settled in, I called my family and girlfriend, who were questioned by the authorities. News about my escape spread fast. A painter friend told me that he had gone to visit Ai Weiwei, who is still closely watched. When my friend mentioned that I had mysteriously landed in Germany, Old Ai’s eyes widened. He howled with disbelief, “Really? Really? Really?”