Academician Tingye Li's lecture lit a lamp in my life, which benefited me a lot. I learned dedication, responsibility, persistence and, most importantly, challenges in his life.

Grandpa Li's life is full of ups and downs, and it is precisely because of these ups and downs that his life is more brilliant. Grandpa Li devoted his life to optical fiber communication and the world. No matter how difficult it is, he never gives up and always sticks to his dream. He is not only responsible for his career, but also for his family. In his introduction, I saw a happy family, felt his deep love for his family and heard the voice in his heart-he was proud of his family. From Grandpa Li, I learned an important lesson in life and a philosophy of life that is more valuable than knowledge.

A student asked Grandpa Li, "Did you encounter any difficulties in your research? How did you overcome it? " Grandpa Li replied without hesitation: "There are no difficulties in my life, only challenges!" "This sentence is like dropping a stone on a calm lake, which shakes my heart: how can there be no difficulties in life?

Grandpa Li is right. This is what I keep thinking about. What's the difficulty? Isn't the difficulty our inner fear and retreat? We always feel that it is difficult to do anything, and then we choose to give up, quit every time without a fight, and then push everything to the front of difficulties. What's the point of this life?

Everyone doesn't want to be ordinary, but if you don't challenge, you are destined to be ordinary. The famous American writer Helen? Keller is a great woman who is deaf, dumb and blind. She declared war on fate with tenacious will and created a brilliant and perfect life. Isn't this the best interpretation of the challenge? If she gave up on herself and blamed everything on difficulties, how could Helen be today? Where's Keller? Compared with her, we are really lucky. At least we are healthy, so we are not qualified to say difficult things.

As long as we dare to challenge, difficulties will disappear in our hearts forever. Helen, grandpa Li taught us this truth? Keller's bumpy life proved this truth.