The following contents were written in the visiting card Chu Tianyou sent to Mrs. Tang from the TV series "Dragon Roaming the World": " A gentleman who is strong in the sky should strive for self-improvement; a gentleman who is strong in the earth should carry all things with his virtue." This sentence came from the Book of Changes, a classic sentence in ancient Chinese philosophy and culture. It emphasized the values that should be upheld in life, that is,"Heaven's Vigor" emphasized that we should constantly strive and forge ahead like the sky, and always maintain a positive attitude without fear of difficulties and obstacles;"Earth's Kun" emphasized that we should be tolerant of all things like the earth, steadfast, willing to work selflessly, and bear our responsibilities and obligations. This sentence in Chu Tianyou's visiting card to Mrs. Tang in the TV series "Dragon Roaming the World" expressed his deep affection and respect for Mrs. Tang, and also conveyed his pursuit and belief in life values and moral ideals. The values and spiritual qualities contained in this sentence were very important to everyone.