Complex sentence: After making landfall over the southern tip of Taiwan late on August 23, Tembin weakened but regained strength in the South China Sea; moreover, Tembin is currently estimated to make a U-turn and make landfall over the southern tip of Taiwan again.
Split into simpler sentences: After making landfall over the southern tip of Taiwan late on August 23, Tembin weakened but regained strength in the South China Sea, and then the storm made a U-turn. It is estimated to make landfall over the southern tip of Taiwan again.