Abstract: The global energy transition necessitates integrating high shares of renewable energy, with Germany being a pioneering case, achieving 56% renewable electricity generation in 2024. Despite the geographical mismatch between its generation and load centers and the large-scale integration of distributed renewable energy, Germany maintains the stability and optimized resource allocation of its power system. Jiangsu province, as a region experiencing rapid growth in renewable energy penetration, has encountered similar integration challenges. This paper critically assesses Germany's grid planning and management strategies, focusing on the reinforcement of i transmission corridors, market-driven utilization of corridors, renewable energy active curtailment, and elevating grid connection standards for renewable energy. Through a comparative study with Jiangsu's current practices, this research identifies the core differences in their approaches and offers feasible recommendations for optimizing transmission and distribution grid planning and operation in Jiangsu and other similar regions.