Saudi Arabia is the largest labor market in the Gulf region. According to Saudi official statistics, there are approximately 8 million foreign workers working in the Kingdom, but some analysts estimate that there are still 2 million unregistered foreign workers. Foreign workers mainly come from India, Pakistan, Bangladesh, Philippines, Morocco and other countries. Currently, there are more than 100 Chinese companies and about 30,000 Chinese workers in Saudi Arabia. Most of their business involves project contracting. Chinese companies generally apply for legal work visas for workers.