knowing that there are tigers in the mountains, you prefer to walk in the mountains. Supplement: 1. The sword blade is sharpened, and the plum blossom fragrance is bitter and cold. 2. Since ancient times, great talents have suffered many hardships, while dude children are few and mighty men. 3. Being poor and strong, and not falling into the lofty goal of reaching the top of the world. 4. Being a human being, you must first suffer his mind, work his bones and muscles, and starve his body and skin ... Sunshine is always after the storm!