What is the subtle foreshadowing of Hello World?

Hello, World is an animated film directed by Japanese director Makoto Shinkai. There are many subtle foreshadowing in the film, some of which are:

1. At the beginning of the movie, Jianshu and Liuli meet to attend the fireworks show, but at the end of the movie, they meet again to attend the fireworks show.

2. At the end of the movie, Jianshu and Liuli meet in the virtual world.

At the end of the movie, Jianshu and Liuli meet in the real world.