Quick deliveries of large orders for stuffed toys, fake eyelashes and crocheted bags that are made with cheap labor, including some workers who are on the job for 16 hours straight. This is the pitch some Chinese businesses are making on social media to potential customers. But the products they are selling are made in North Korea, like in this video of a wig factory. In the posts, which have proliferated in recent years, some Chinese entrepreneurs say that they own factories in North Korea and openly share contact information,…