Migratory birds fly south and return to the sea.

The next sentence of this sentence is "I hope you are by my side".

The sentence "Migratory birds fly south into the sea, I hope you come for me" is full of expectation and affection. Migratory birds fly south, symbolizing the change of seasons and the migration of life, implying a natural law and life phenomenon. "Thousands of Rivers Return to the Sea" expresses the philosophical thought of the unity of all things and the return to the origin, symbolizing a kind of home and destination.

This sentence expresses the author's expectation and desire for someone. This is an emotional projection, expressing the author's deep affection and expectation for each other.