What does it mean to leave home and go back to your local accent without changing your hairstyle?

I left my hometown when I was young and didn't come back until I was old. Although my local accent hasn't changed, my hair on my sideburns has become sparse.

About the author:

He (about 659-744) was born in Yongxing, Yuezhou (now Xiaoshan District, Hangzhou, Zhejiang). Poets and calligraphers in Tang Dynasty.

He was famous for his poems when he was young. Wu Zetian won the second prize in Shengyuan year (695), awarded Guo Zi Simen Doctor and moved to Taichang Doctor. During the Kaiyuan period, Zhang claimed to be the messenger of writing books in Tang Dynasty, and invited him to the academy to write six classics and essays.