1, anything new is always like this at the beginning. At first, there were many enthusiastic people, but they soon cooled down and gave up doing it, because he already knew that it was impossible without hard work, and only those who wanted to do it could endure the pain. -Dostoevsky

2. How can I get plum blossoms lukewarm? -Fan Song

Don't lose heart, as long as you persevere, there will be results in the end. -Qian Xuesen 4. It is often the last key to open the door. -Yan Yu

Success lies not in strength, but in how long you persist. -Johnson