Despite low unemployment and high demand for workers in China, wages have been largely stagnant for the past year, especially for migrant workers. This problem has also been observed in Europe and US, where wage gains have remained low even though unemployment has decreased significantly. Possible explanations include low expectations among workers due to previous financial crises, or the relative increase in demand for jobs in China’s old economy compared to higher-paying jobs in the new economy. The old economy includes sectors such as energy, mining and excavation, while the new economy includes sectors like law, software, and pharmaceuticals. While jobs are easier to find on all fronts, wages have continued to shrink for urban and rural workers.
See "Strong demand for workers in China, so why aren’t wages rising?", South China Morning Post, July 24, 2017