In fact, I have long wanted to make a documentary on this kind of subject, since I was a child, I have been interested in unsolved mysteries and aliens, and I have a general understanding of the cases of alien contact that have happened in China, including Meng Zhaoguo, Huang Yanqiu and Zhang Xiangqian, and I have been paying attention to the related video materials. When I watched Mr Zhang’s related video earlier, I found that his experience was distinctly different from the other two, as he was the only one who claimed to have been transmitted alien knowledge by aliens and stayed on an alien planet for a month. Before that, many people had already visited Mr CHEUNG Cheung-chuen. I actually had a lot of doubts and suspicions, so before I decided to film, I researched into the views of Mr CHEUNG Cheung-chuen on the Internet, which also included some relevant people with professional knowledge and other bloggers. In fact, I did not find any loopholes in what Mr CHEUNG Cheung-chuen had said. In other words, he has been completely logical and self-evident. Therefore, driven by curiosity, my partner and I went to visit Mr Zhang Xiangqian. After a few days of filming and spending time with him, I had a feeling of admiration for Mr Zhang Xiangqian. A person whose appearance is not in line with the knowledge he speaks actually appeared in front of us. Moreover, he was able to deduce the theory he created over and over again and stick to it for close to thirty years. I thought to myself at the time, “Even if this is all a lie, then I still have a sincere admiration for him. A man who did not seek money or profit, but only sought to apply his extraterrestrial knowledge to the Earth, and for this he persisted for thirty years. So, with a neutral and objective attitude, we filmed Zhang Xiangqian’s experience through memories and physical evidence.