Printing in the 17th century China was no longer limited to the scholar or the officials, but it was also used by merchants, to print their daily entries. Moreover, reading during this time grew a leisure activity. Almost all the sections of the society began reading poetries, autobiographies, romantic plays etc. This new reading culture was followed by modern technology. In the late 19th century, Western publication methods and mechanical presses were introduced in China as a result of the establishment of Western powers outposts in China. Thereon, Shanghai became the hub of the new print culture, provisioning to the western school. A gradual shift could now be seen in the method of printing from hand printing to machine printing.
The characteristics of this song most likely indicate is:
It is from the late Romantic Period.
A lot of pop music producers will start with a basic four-chord pattern, I–V–vi–IV. For example, if you are in the key of C Major, you would play a C Major chord (CEG), a G Major chord (GBD), a A minor chord (ACE), and an F Major chord (FAC). That is a popular "template" so to speak that can lay down the basic line for you to put other instruments over.
If you really want to get involved, a little bit of music theory never hurt anybody. You don't need to know much to get a basic understanding of the way things work.
I hope this helps :)
