The parade through Tiananmen Square commemorating the 80th anniversary of Japan's defeat in World War II featured China's DF-61, which is believed to be its newest land-based intercontinental ballistic missile, and the DF-31BJ, an upgraded version of older ICBM models. For now, little is known about either system, including their operational status. Even if these systems are developmental, China has a sizable arsenal of land-based ICBMs.