Complex sentence: Even though Jiangsu were able to gain some financial stability, they were still relegated to the third tier at the end of the 1996 season, but only spent one season in there after they won the division league title in 1997.
Split into simpler sentences: Even though Jiangsu were able to gain some financial stability, they were still relegated to the third tier at the end of the 1996 season. They spent one season there after they won the division league title in 1997.