Traditional industries that refuse to move forward are quickly left behind.
Tips
history
Related to the Han-era story in 《汉书·叙传上》 about the man from Handan who studied someone else's walk: "曾未得其仿佛,又复失其故步" — he never mastered the new step and lost his own original gait. 固步 here literally "fixed step" — sticking rigidly to one's old way.
mistakes
Often written 故步自封 — 故步 (old step) and 固步 (fixed step) both circulate; modern dictionaries accept both, but 固步自封 is the form listed in Xinhua's chengyu dictionary.