Know yourself in the sea, and heaven is still our neighbor. —— (Tang)

It is enough to know one thing in life, and the world should treat it with empathy. -Lu Xun

Friendship is like a bright light in my past life, shining on my soul and making my existence a little glorious. -Ba Jin

A friend in need -(Soviet Union) Lenin

A true friend is happy for you when you succeed, but doesn't support you. I will give you timely support and encouragement when you encounter misfortune or sadness. When you have shortcomings and may make mistakes, you will give correct criticism and help. -(former Soviet Union) Gorky