In 1931 nine one eight incident, the Japanese occupation of Northeast China, North China and further approximation, a lot of the Kwantung Army southward, and our army in the Great Wall fighting, then the national government, to take "within an 攘外 first" policy, the Japanese compromise, step back to humiliate the country and forfeit its sovereignty, signed the "Tanggu agreement", I retreat from the the Great Wall, Beijing Tianjin Hebei and designated as a demilitarized zone, Japanese reached its initial goal, but it did not stop, but quietly from the surge, as various means and conspiracy, attempt to devour my whole North China, by 1935, Tianjin and North China the situation becomes more and more intense, Beiping city in a precarious, Japanese to North China into second "Manchukuo", while Jiang Jieshi implementation of the policy of non resistance, the central army and gendarmerie three group from North China, Beiping city became "demilitarized zone", because the Beiping city no garrison, the security situation is deteriorating, a series of murders, much Mancheng jittery, the last 29 army troops into the city formed regiment, headed by the two sides recognized Qiu Sanqi as. Qiu Sanqi is one of the rich men's sons, Japanese and Jiang Jieshi take a fancy to him for this, so give him "anti responsibility", life he cracked the case fans, but Qiu Sanqi is that the Communist party. Qiu Sanqi first found himself fell into the trap, Japanese and Jiang Jieshi set a trap, he must be careful, a little careless, is a fatal disaster.