Gāotiě ràng chéngshì zhījiān de jiāotōng gèngjiā biànjié.
High-speed rail has made travel between cities even more convenient.
Tips
usage
便捷 is slightly more formal than 方便 (fāngbiàn) and emphasizes both convenience AND speed. You'd describe a new subway line or an app feature as 便捷, but you'd ask a friend 你方便吗 (are you free?), never 你便捷吗.
