Everything is under ideal conditions, only considering the flow of seawater (that is, ocean currents). The possibility of this bottle drifting to the Black Sea in Ukraine is almost zero! This is just a theory!

But anything is possible! From the Pearl River to the South China Sea, influenced by the northern cold current (part of the Thousand Islands cold current), it drifts to Southeast Asia, flows to the Atlantic Ocean along the east coast of Africa under the action of wind and waves, and flows to the Gibraltar Strait under the influence of ocean currents. Due to the high density of seawater in the Mediterranean Sea, the surface seawater of the Atlantic Ocean flows to the Mediterranean Sea, and the bottle also flows to the Mediterranean Sea with the seawater. Because it is a dense current from the Black Sea to the Mediterranean Sea, the surface seawater is from the Black Sea to the Mediterranean Sea, but there is a strong wind blowing.

The geography of the first day is related to ocean current knowledge! Can refer to it!

Textbook:/gzdl/jszx/kbjc/bx1/dzkb/200412/t20041209 _140619.htm.