Meaning: well established and growing

Original: 只有植根于本国、本民族的历史文化沃土，马克思主义真理之树才能根深叶茂。“第二个结合”为马克思主义中国化时代化注入强大的文化力量、筑牢厚实的文明根基，为实现中华民族伟大复兴提供了科学指引。

Background: Today in Beijing’s Center for the Study of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era a speech was given on the importance of Chinese culture. The speech highlighted the need for cultural pride among Chinese citizens, and China’s fundamental role in the world’s development.

Source: 为建设中华民族现代文明作出首都贡献（深入学习贯彻习近平新时代中国特色社会主义思想）