Although the mountains and rivers have not been destroyed now, we should continue to strengthen ourselves for the future of our country and nation.

According to Baidu Wenku query, "Although the mountains and rivers are intact, we should strengthen ourselves" means that although the mountains and rivers are not damaged now, we should continue to strengthen ourselves for the future of the country and nation. "The mountains and rivers are in good condition" comes from "The Songs of Chu", which means that the rivers have not been damaged, and everyone in the world is safe and their lives are stable; "We should strengthen ourselves" comes from Wang Zhu's "Poem of Prodigy", which means that the princes and generals are inherently good. It's not something you're born with, people with ambition should work hard. The combination of these two sentences expresses the determination and belief to be positive and forge ahead, inspiring people to make unremitting efforts for the prosperity of the country and the nation.