Amid growing pressure for sustainable development, understanding the impact of green technology innovation (GTI) on firm performance has become increasingly important. However, existing studies on this relationship remain inconclusive, especially regarding how it varies across different firm lifecycle stages. This paper uses data from 4,275 firms in China's A-share market from 2007 to 2022 to explore the impact of GTI on firm performance, considering lifecycle stages. The results show that GTI positively impacts both financial and social performance. GTI enhances financial performance by boost...