Why do so many Chinese enterprises invest in the Middle East in building field?

Low price,high quality.As we know,China is a big country running numerous cheap products especially raw materials and in the Middle East,some countries need them for themselves.In addition,China has nice relationship with many counties in the Middle East so that China is encouraging enterprises to export products or cooperate with them.For example ,the Middle East is the main target market for Jialifu with the support of Chinese policy and develop fast now.Thanks for your answer and have a good day.