承前启后

1. • to follow the past and herald the future (idiom) part of a historical transition
2. • forming a bridge between earlier and later stages

Character by character

• 承(chéng)surname Cheng
• 前(qián)front
• 启(qǐ)Qi son of Yu the Great 禹 yǔ, reported founder of the Xia Dynasty 夏朝 xiàcháo
• 后(hòu)surname Hou