People who lose money on contracts must understand the truth:

When you are growing, others are growing too,

There are always people who better than you.

When you think of countermeasures, others start to change their policies.

What you think of has already been thought of by others, and what you have not thought of has been thought of by others.

Loyalty is helpful to one's actions. Only those who are foresight can make money, and those who are late and aware can only become leeks.

Don't do porcelain work without diamonds.