1. First log in to the online music platform, search for Zhang Zhenyuan's "Butterfly" album, and listen to the album online or purchase the digital music version on the platform.

2. Next, go to the local physical music store and buy the physical CD version of Zhang Zhenyuan's "Butterfly" album.

3. Finally, log in to major e-commerce platforms and enter Zhang Zhenyuan’s butterfly album in the search bar to search to see if there is a physical CD version or purchasing channel.