Genshin Impact.

Under the guidance of the old man, Lin Feng and Li'er began their journey to the mortal world to experience hardships.

They landed in a bustling town, with people coming and going and cars and streams everywhere. Lin Feng looked around curiously, while Li'er followed closely beside him.

"Lin Feng, this place is really different from our fairyland." Li'er said.

Lin Feng smiled and responded: "Yes, but this is also the wonder of the tribulation."

They wandered around the town and saw all kinds of people and things. An old man performing acrobatics on the street attracted many people to watch and cheer; a little girl was crying on the street, and it turned out that she was separated from her family. Lin Feng and Li Er helped the little girl find her family, and the little girl's smile filled their hearts with warmth.

However, the road to the robbery was not smooth. One day, they encountered a group of robbers in the mountains outside the city. These robbers had hideous faces and sharp blades in their hands, and blocked their way.

"Hand over all the valuables you have on you!" said the bandit leader viciously.

Lin Feng stepped forward and said, "How dare you do such an evil thing in broad daylight!"

The robbers laughed and rushed forward. Lin Feng and Li Er used their magic, but due to the restrictions of their experience in the mortal world, the power of their magic was greatly reduced. After a fierce fight, they finally repelled the robbers, but they were also slightly injured.

"It seems that the dangers in this mortal world should not be underestimated." Li'er said with a frown.

Lin Feng wiped the blood from the corner of his mouth and said, "But we can't retreat. This is our road to tribulation."

They continued on their way and came to a village. The people in the village lived in hardship and diseases were rampant. Lin Feng and Li Er decided to help them and searched for herbs to treat the villagers.

During this process, they met a young man named Aniu. Aniu was hardworking and kind, but because of his poor family background, he had never been able to realize his dream. Lin Feng and Li'er encouraged him and taught him some survival skills.

"Thank you. I will definitely work hard to change my destiny." Aniu said gratefully.

As time went by, Lin Feng and Li'er's experiences in the mortal world became richer and richer. They helped poor old people, saved villages besieged by floods, and fought against evil forces.

One day, they met a mysterious old man in an ancient temple. The old man had deep eyes, as if he knew everything.

"You still have a long way to go, and the faith in your hearts must not be shaken," said the old man.

Lin Feng and Li Er bowed respectfully, "Thank you for your guidance, Senior."

In the process of going through the tribulation, Lin Feng and Li Er's state of mind is constantly changing. They gradually understand the suffering and joy of the world, and cherish their feelings for each other more.

However, greater challenges are still to come. A dark force is rising in secret, trying to destroy the peace of the world. Lin Feng and Li Er decide to stand up and fight this dark force to the death.

They gathered intelligence everywhere, looked for allies, and prepared for the upcoming war. In the process, they met many like-minded people, and they worked together for justice.

Finally, the moment of the decisive battle arrived. Lin Feng and Li Er led the crowd to fight against the dark forces in an empty valley. The battle was extremely fierce with swords flashing and spells flying.

Lin Feng and Li Er cooperated with each other and exerted unprecedented strength. After a hard battle, they finally defeated the dark forces and saved the world.

"We did it!" Li'er said excitedly.

Lin Feng held her hand tightly, "Yes, this is our joint effort."

After this great battle, Lin Feng and Li'er's journey of tribulation is coming to an end. Looking back on this experience, they are filled with emotion.

"We have gained so much from the trials we have experienced in this mortal world," said Lin Feng.

Li'er smiled and nodded, "After we go back, we will definitely have new insights."

Under the guidance of the old man, they embarked on the journey back to the fairyland, looking forward to a new beginning.