Qian Fenghua is a man Di Jiu met under the Polar Night Sky Market, here's his story :
“My name is Qian Fenghua and my cultivation partner was called He Weiwei. We were very much in love while we were traveling in the galaxy. We were indeed a harmonious couple. Unfortunately, those happy days did not last long. One day, I discovered that He Weiwei actually had an affair with another man. I was so furious that I wanted to demand an explanation. Who knew that He Weiwei would ignore me completely? She ran away and left me. Of course, I was not about to let this rest. We both chased each other until we reached the low-level plane…”
“After running for some distance, Weiwei took out a Dharma treasure and engaged me in battle. At the time, I was so angry that I didn’t hesitate. I took out a Dharma treasure and attacked her with my full strength. I had not expected that Weiwei wouldn’t use her full strength to block my attack. It seemed as though she was letting me kill her without any form of retaliation. I anxiously shifted the direction of my attack without checking where I was. I didn’t expect that the place where we were fighting would be in the galaxy outside the Night Star Continent. The Night Star Continent was split into two by my move…”
“When we discovered that the Night Star Continent was split into two, Weiwei cried and said that she was wrong, that she shouldn’t have stopped there. At the time, I was also dumbfounded. Both Weiwei and I had been born in the Night Star Continent, so splitting the Night Star Continent into two was beyond ungrateful. I forgot about my need to accuse and question Weiwei and got lost in my desire to repair the Night Star Continent. Weiwei consoled me by saying that we should remedy the mistakes we’d made and that everything else could wait till the Night Star Continent was repaired. After the continent was repaired, she would give me an answer. She said that the explanation would not be what I had imagined.”
“I felt extremely guilty, so I placed all my focus on repairing the Night Star Continent. That was why I actively entered the Night Star Sky Market that I’d split into two. The Night Star Planet might be a low-level planet, but repairing it was still not an easy feat, despite my strength. Weiwei blamed herself. She said that she had to find the Law soil that could repair the Night Star Planet and bring it back to the planet. I asked Weiwei to lock me within the sky market of the Night Star Planet and swore that I wouldn’t leave if I didn’t manage to repair the Night Star Planet.”
“I have been refining various array flags to prevent the dispersal of the Night Star Planet’s Laws to the best of my ability. Weiwei went to search for the Law soil"
Conclusion, he is a powerful man betrayed by his lover trying to reunite his motherland he "accidentally" destroyed. Both continent actually became Polar Night Continent also known as Polar Night Planet the other became the Half-screen Continent.
He eventually succeded with Di Jiu's help but while they fixed it, it was only superficial. The true Dao Law was still shattered and the Night Star Continent would still not be able to produce any powerful cultivators.
In order to restore the Heaven-Earth Dao Law of the Night Star Continent, one needed to search for experts from the Immortal World
He greatly helped Di Jiu by guiding him in his cultivation and various skills. He also gave him lots of informations on the universe, immortal crystals and other gifts. Di Jiu eventually recognised him as his Master.