Question

北京以前叫北平，后来改成了北京。 Beijing used to be called Beiping and got changed into Beijing afterwards. [Past Event 1] ，后来 ，[Past Event 2]

Accepted Answer

Běijīng yǐqián jiào Běipíng, hòulái gǎi chéng le Běijīng. Sequencing past events with "houlai" https://resources.allsetlearning.com/chinese/grammar/ASGY0UDC

中文	北京以前叫北平，后来改成了北京。
Pinyin	Běijīng yǐqián jiào Běipíng, hòulái gǎi chéng le Běijīng.
English	Beijing used to be called Beiping and got changed into Beijing afterwards.
Article Title	Sequencing past events with "houlai"
Grammar Construct	[Past Event 1] ，后来，[Past Event 2]
Source URL	https://resources.allsetlearning.com/chinese/grammar/ASGY0UDC

Beijing Event 北京以前叫北平，后来改成了北京 Běijīng Yǐqián Jiào Běipíng Hòulái