上海开埠以后,色情业很发达,租界内外都有红灯区,还有卖黄片的。旧上海虽然已经有了电影,但是由于制作技术和播放设备的限制,制作色情光盘的生意还没有出现,所以这黄片不是指黄色光盘,而是指黄色 After the opening of Shanghai, the sex industry is well-developed. There are red-light zones inside and outside the concession, as well as pornographic films. Although the old Shanghai already had a movie, due to the limitations of the production technology and playing equipment, the business of making pornographic discs has not yet appeared. Therefore, this pornographic piece does not mean a yellow disc but a yellow