when it is not against the farming season, the grain can't beat the food; If you can't count, you can't eat fish and turtles. Axe Jin enters the mountains in time, and wood and wood can't be used. Valley and fish and turtles can't beat food, and wood and wood can't beat use, which makes people lose their lives and have no regrets. There is no regret in keeping in good health and dying, and the beginning of kingly way is also.

-"Mencius Liang Hui Wang Shang"

Mencius advocated saving resources and protecting the sustainable development of the ecological environment, that is, the idea of "keeping up with the times". Mencius advised people not to fish with satin nets, so as to leave smaller fish to continue to grow and reproduce; Logging should follow the prescribed season and follow the nature to meet the needs of continuous utilization. Mencius taught people that the growth and reproduction of all animals and plants have ecological laws of development and growth according to seasonal changes, so we must conform to the laws and do not try to break them. Furthermore, people must carry out agricultural production, logging, harvesting, fishing and hunting according to the ecological law of the growth and change of all things, and obtain the means of subsistence moderately. Don't use it excessively, which will lead to the imbalance of the ecological environment and lead to the end.

if you have it, nothing will last long; If you lose your support, nothing goes away. -

Mencius emphasized the protection of natural resources while "entering the mountains with time". "Conservation" is very important, not only to take it in moderation, but also to minimize people's demands on nature and maintain its original appearance, that is, Mencius said, "you can take it, you can take it without it, and you can take it cheaply; Can be with, can be without, and hurt "("Mencius Li Lou "), so that all things in nature breed vigorously, harmoniously and orderly, and maintain a good ecological cycle system.

There are rich ecological ethics in Mencius' thoughts, and it is also very beneficial to the ecological construction of today's society to review Mencius' ecological ethics. Mencius told us that while developing the economy, we should pay attention to "keeping up with the times", conform to and protect nature, pursue eco-economic efficiency on the premise of saving resources, energy and reducing pollution, and realize the coordination and unity of economy and environment in economic activities.