The sea embraces all rivers; a tiger leaps over five continents, etc.
"龙腾四海" means the dragon soaring among the four seas, which is a metaphor for a person who can show his talents in various fields. The next sentence is "the sea embraces all rivers", which means the dragon soars among the four seas, and The sea can hold the water of hundreds of rivers. It is a metaphor for a person who is broad-minded and able to tolerate all kinds of things. It is also a metaphor for a person who can show his talents in various fields and has extensive connections and resources.
"The dragon soars across the four seas and the tiger leaps across the five continents" means that the dragon soars across the four seas and the tiger leaps across the five continents. It is a metaphor for a person who has outstanding abilities and talents and is able to overcome various difficulties and challenges to achieve his goals and ideals.