Year 2015 witnessed an explosion of negative side effects China’s industrialization due to ineffective regional planning. In April，a PX factory in Zhangzhou，Fujian province exploded，driving over ten thousand people away in the emergency evacuation. In June，a public protest outbursted in Jinshan，Shanghai，resulting in a suspending on the EIA for a chemical industry zoning. In July，a series of explosions overtook a discontinued factory in Lanshan，Shandong province，caused road closure and local residents escaping，during which the labyrinth of underground lines，pipes and oil tanks made the rescue efforts ever more dangerous. In August，a massive explosion shook Tianjing city，causing reflecting on the chaos of harbor planning throughout the nation. At the end of 2015，a debate on the relocation plan for Lanzhou Refinery company evoked major debate on planning environment impact assessment（PEIA）. In China，the ordinance of PEIA law went into effect in 2009，but the loopholes of the law had a full manifestation in 2015. The country’s painstaking cases and conflicts showcased how a faulted outlaying can undermine stability of a city，which in turn turning an environment conflict into social instability. This report starts with above-mentioned case studies，with an analysis into how the PEIA system came in reality in China，and how it had failed to be effective. The author also provided recommendations on reforming the current PEIA processes.