Shenzhen has only Wonder's office, and Nanjing has a branch office.
In the past, sales training was conducted in Shanghai headquarters. In order to save costs, all sales training is now conducted in Nanjing.
Wonder's software products are more complicated. A week's training is to familiarize you with the company's software, and colleagues will examine your ability to accept knowledge. There will be elimination in a week, and many people will be screened out, so even if you are hired now, it doesn't mean that you will eventually be left behind.