Is it true that Guangzhou is a breeding base for humans and sows?

According to Baidu Aigou.com, a photo of a billboard recently spread widely on social media, which read "Guangzhou people and sow breeding base". This billboard was ridiculed by netizens as "the most deflated billboard" and "the strongest billboard in history", which caused widespread concern and heated discussion. But after investigation, it was found that this billboard did not really exist. The photo was actually designed by a netizen on Photoshop. It can be seen that the original picture should be another billboard, and the netizen changed it to "Guangzhou people and sow breeding base"