The secret

"Want to learn?"
Pollux Alder turned around and asked with a smile.
Yun He was a down-to-earth person. He nodded repeatedly and said, "Yes, of course I do!"
"It's fine if you want to learn this method, but you must satisfy one condition of mine first."
As he said this, Pollux Alder pointed his finger towards the interior of the Motuo Hall and said, "There are a total of ten bronze tripods in there. The heaviest weighs 30,000 jin, and the lightest weighs over 10,000 jin. If I choose...