Joy of Life's opening password was Wu Zhu's name. In the movie, Fan Xian opened the box his mother had left for him and found a combination lock on it. After inserting the key and entering the password, Fan Xian successfully opened the box. There was a letter inside. Fan Xian needed to use the five-stroke input method to enter Wu Zhu's name to unlock the password.
Joy of Life's opening password was Wu Zhu's name. Only by using the five-stroke input method to enter Wu Zhu's name could the password be unlocked.
There was no clear answer to Joy of Life's unzip password because different download sources might have different unzip passwords. If you downloaded Joy of Life resources from the Internet, there might be some unboxing passwords set, but not all resources required a password. If you need to unzip the password, you can try to contact the website or resource that provides the download.
Use a password manager app. It helps generate strong and unique passwords and stores them securely.
I have no idea what the passwords are in that visual novel. Maybe you can try looking for clues within the game's storyline or dialogues.