"Plants will sprout, children will grow up, the train of years will not stop for anyone, and the platform of fate, joys and sorrows are all moments" comes from the ending song of the TV series "The World on Earth", which was composed by music producer Lei Qian, written by Tang Tian and sung by famous singer Jia Lei. The songs are step by step, with distinct layers and resonant melody. With deep and melodious singing and touching lyrics, singer Jia Lei's gentle and high-pitched voice and fierce singing perfectly interpret this difficult work spanning two octaves. Emotion is full of moving, moving, talking, feeling and hope for the future. It perfectly fits the mood of the characters in the play, sings all kinds of things in the world and shows a simple picture of the times. On Earth is an epic that reflects the life and development of grassroots people after the founding of New China, and it can also be said to be an epic of China civilians. The play describes the changes of a family in the past 50 years, and promotes the development of the story with the deep friendship of three generations of Zhou family. Several people in the Zhou family have had misunderstandings, understandings, complaints, support, true feelings and goodwill, and regrets. With the development of the plot, it shows a strong sense of the times. The play depicts typical examples of several typical characters. Through typical story setting, most audiences are moved and the haze accumulated in people's hearts is removed. This TV series is like a beautiful and moving song, which warms the hearts of most viewers.

Jia Lei's singing is effortless. In pronunciation, Jia Lei always keeps clear pronunciation and mellow voice. Jia Lei, who was born in the Opera House of Ancient Paintings, has a profound knowledge of enunciation. At the beginning of Jia Lei's singing "On Earth", she deliberately adopted the external way of biting the prefix, because if she bites the prefix too hard, her throat will be tense and her voice will be inelastic. Only by nibbling the prefix can the mouth and throat be relaxed and make a smooth and full sound. Runqiang is a common singing method in Jia Lei. Runqiang refers to a unique set of techniques to beautify, modify and polish China's vocal music in the long historical development. In the course of studying ancient paintings and operas, Jia Lei has mastered many techniques to moisten the cavity. Therefore, in vocal music singing, she can flexibly use the skills of moistening the cavity according to the specific singing content, so that every voice is like a finely crafted pearl, full, round and transparent, thus giving her singing a warm feeling.

"On Earth" is "a warm, simple song with infinite power".