What is the theme of the short story 'Mirror Image'?

The officer Zhou Ping'an, who had recently graduated, by chance obtained a Broken Mirror that could traverse the Different World. Since then, the sky had been the limit for the birds to soar, and the vast ocean a stage for the fish to leap…

Reborn as a human, Xu Qing uses a bronze mirror to navigate the ups and downs of the mortal world, avoiding danger and seeking the path of immortality!

When they first met, Tang Wan sighed, “The fifth young master of the Jiang family is just as the rumors said. He’s celibate, aloof, prideful, and is a man to be revered. Unfortunately, he’s so smart that he no longer has any will to live, which made him sickly, and he’s going to die soon… Later on, the fifth young master brought her into his room. When she came out, everyone stared at her in shock. Why was she crying? …… Later on, it was said that the fifth young master returned after he recovered from his illness, and he brought a girl back. She appeared pure and harmless, but underneath that harmless appearance, she was actually a spitfire that offended quite a number of people. But the fifth young master just said, “I brought her back, so I’ll let her do whatever she wants. If… anything happens, I’ll take responsibility.” His best friend gave him a reminder. “You’re going to be responsible for someone from the Tang family?” “Since she came back with me, she’s mine. She’s just a young girl and is spoilt. I have to take responsibility.” After Tang Wan married into the Jiang family, she only had one mission. She must give birth to his children before he died! Meanwhile, the fifth young master was puzzled. “You’re a gentle and shy girl during the day, so why are you so different during the night?” Tang Wan thought. ‘I have to make every second count. He won’t be able to live long.’ After she gave birth to his son and he became one year old, Tang Wan was prepared to become a widow. However… ‘Why isn’t he dead yet?’ Much later, the fifth master of the Jiang family asked her, “I heard that you’ve been looking for my death every day. Do you want to kill me by sucking me dry?”

After her grandfather's death, Bai Hanyun was disowned by her parents and cast out of the Bai family. With nowhere else to go, she left the city and returned to the countryside. There, by a twist of fate, she discovered an antique mirror hidden in the basement of her newly purchased home. From that moment on, strange events began to unfold—until one day, she stumbled upon a prayer from a young general. Feng Xiyan, besieged by the Yuezhi Tribe and betrayed by the imperial court, had been driven into a desperate corner. With no access to water, food, or medicine, he and the citizens of Xiqiang City could do nothing but await death. But just as all hope seemed lost, Heaven intervened. From that moment on, the Feng Army and the people of Xiqiang City had enough food and water, living lives more prosperous than even the Emperor himself.

Merin is reincarnated into a new world.  After he died in his previous world. And the new world is an extraordinary world. He is full of curiosity and fear for the new world. But he is born in the new world as a tree. Struck in a place. To explore the new world, he tries to find way to escape from his tree body, or transforms himself to a humanoid. In the process, he finds the reason he reincarnated into this world.  A mirror, that can send his soul to reincarnate into new worlds. Authors note- The first volume would be of Merin's life in another world and as a human.

Xu Jinzhi lived a healthy life until she was seventy-five, passing away without much suffering, and seemingly without any major regrets or dissatisfaction. However, looking at her son, daughter, grandchildren, and great-grandchildren beside her bed, Xu Jinzhi couldn't help but think of her late husband who died young in an accident, wondering if she would be able to see him again—if only she could. Upon opening her eyes next, Xu Jinzhi shockingly finds herself transported back several decades in the past, at a time when the Xu and Xie families were negotiating a business marriage. Without hesitation, she mentions the name 'Xie Yanchuan.' In her previous life, marrying Xie Yanchuan was a reluctant choice, but in this life, she chooses him decisively! The Xie family holds significant influence in City A, Xie Yanchuan, however, is the overlooked member of the family, overshadowed by his older brother carrying familial responsibilities and a younger, frail brother. This setup doesn't bother Xie Yanchuan much; he is content with living quietly. One day, the marriage arrangement with the Xu family lands unexpectedly on his shoulders, resulting in his marriage to the woman named Xu Jinzhi! Xie Yanchuan initially prepares for a marriage of mutual respect or non-interference. However, why does Xu Jinzhi always surprise him with her unexpected actions?