The first thing is to learn. There is a cost to study, even if the sage Confucius, answering questions and solving doubts should accept dried meat as a gift. When it comes to learning expenses, it is slightly different from buying and selling other goods. You don't know how much knowledge you can get, it depends not only on the teacher's level, but also on your own state. In some cases, this is a bit like buying cattle across the mountain, and it is even more risky than stocks. No one can guarantee that you will be admitted to the university after paying the tuition fee, you can only invest in advance. Opportunity is a child holding a wedding dress.

If you don't study, the bride will never appear in the palace of your life.The second thing is travel. Everyone is born as a tadpole and grows up to be a frog in the well. It's not your fault, it's just your limitation, but you have to make up for it. To understand the world, one must go far away. Traveling costs money, everyone knows that. The benefits of tourism are not obvious at a glance, and often need to be accumulated subtly over time. Some people think that traveling is just to take some photos and buy some small handicrafts, but it is not. Traveling makes our bodies aware of different winds and waters, and our minds become alert and colorful under the nourishment of different styles.

The third thing is to exercise. The ancient people did not have the habit of exercising specially, and they had no fat at all when they were hungry and full. The need to survive forced them to keep running and hunting. In their spare time, they pretended to be ghosts, chiseled paintings on the rock walls, and danced by the bonfire, all of which were not light physical labor and could not accumulate excess calories. With the progress of society and the abundance of materials, the inexhaustible heat has become a lingering burden for us. So artificially wading on machines, bobbing in chlorine-filled pools, rolling on artificial snowflakes and ice, climbing artificial concrete cliffs... it's a stupid extravagance, but we have no choice but to do so. Constantly pouring money into training barren muscles and bones to maintain a minimum of strength and a minimum of agility.

Is there any way to save money? Actually there are. Treat life as a classroom, learn from everyone, and save money for school. Going far away on foot saves money on travel. Without any fitness equipment, just kick the shuttlecock at home and do radio gymnastics with high legs...and save money for fitness.

However, this is also a waste of money, because we paid for our time.