Although bamboo is rooted in broken rocks, it clings to the green mountains, and its foundation is instant; it does not grow anywhere, showing its tenacious vitality; no matter how strong the wind blows, it is still strong, do you think it is bamboo? Don't you think about the concerns of our country's heroic sentinels? Don’t they embody the spirit of bamboo, his firm will and fearless character that defies all difficulties?