Where Is Chang'an, Where Is My Hometown?

I am one year older than him. Because we live in the same village and are separated from each other by neighbors, we have a close relationship with the elders in our family. He and I have known each other since childhood, and we can be called childhood sweethearts. Our elders also wanted to get married, so they decided to marry him and I will inform us when we are adults... [The female protagonist Chang Xi (an four tones)] [The male protagonist Gu Li (li) two tones]