Complex sentence: He served as General Manager of Palm Eco-Town Development Company Limited for over 20 years and helped develop the company from a plant nursery to China's largest and most successful landscape development and construction companies.
Split into simpler sentences: He served as General Manager of Palm Eco-Town Development Company Limited for over 20 years. He helped grow the company from a plant nursery into one of China's largest and most successful landscape development and construction companies.