The greatest happiness is to know the source of unhappiness.
Use, do not abuse...Neither abstinence nor excess ever renders man happy.
质量从来不是偶然的,它始终是智慧努力的结果。
犯罪不是由贫困引起的,而是由人们合法和非法收入之间的差距引起的。
In a rapidly changing market, only continuous learning and adaptation can maintain competitiveness.