Gǎigé kāifàng kāichuàngle Zhōngguó lìshǐ de xīn piānzhāng.
The reform and opening-up ushered in a new chapter in Chinese history.
Tips
usage
篇章 is used both literally (chapters/sections in a text) and figuratively (a chapter in someone's life or in history). The phrase 新篇章 (new chapter) is especially common in political and inspirational rhetoric.