On May 25, 1935, after the first unit of the 1st Regiment of the 1st Division of the 1st Red Army, the vanguard of the Long March of the Central Red Army, successfully crossed the Dadu River in Anshunchang, Sichuan Province, Chiang Kai-shek urgently mobilized 2 brigades of the Sichuan Army to reinforce Lu. Fixed bridge. In order to quickly cross the Dadu River and thwart the Kuomintang army's attempt to attack the Red Army from behind, the Central Revolutionary Military Commission decided that the 1st Division and the Cadre Regiment of the 1st Red Army would continue to cross the river from Anshunchang and go north along the left bank of the Dadu River. The main force would move from Anshunchang along the right bank of the Dadu River. Going north, the two roads crossed the river and quickly captured the Luding Bridge.
On the morning of the 27th, the leading force on the right, the 4th Regiment of the 2nd Division of the Red 1st Army, led by regiment commander Wang Kaixiang and political commissar Yang Chengwu, set out from Anshun Field and defeated the Sichuan Army's blockade along the way. After 2 days and nights, 160 troops were forced to attack. kilometers, and occupied the west bridgehead of Luding Bridge on the morning of the 29th. Luding Bridge spans the Sichuan-Kangmao Road, with a total length of more than 100 meters and a width of 2.8 meters. It is composed of 13 iron cables and spans the surging Dadu River. There are cliffs on both sides. The east bridge head is connected to Luding City. The 38th Regiment of the 4th Brigade of the Sichuan Army defending the city (less than 1 battalion) had removed the wooden planks on the bridge before the arrival of the Red Army, leaving only the hanging iron cables. At 16:00 that day, Liao Dazhu, commander of the 2nd company of the 4th Red Regiment, and other 22 commandos braved the intensive firepower of the Sichuan Army under the cover of the whole regiment's firepower, climbed the iron rope, and attacked the other side. When they approached the bridgehead, the Sichuan Army suddenly launched fire. After breaking the barrier, the commando bravely passed through the wall of fire, rushed into Luding City, and started a street battle with the Sichuan army. The follow-up troops entered the battle in time. After fierce fighting, the Red Army occupied Luding City. One part of the Sichuan Army was wiped out, and the rest fled towards the sky. At the same time, the 1st Red Division and the Cadre Regiment defeated the Sichuan Army's blockade, successfully reached Luding City, and coordinated the 4th Red Regiment's battle to seize the bridge. Then, the main force of the Central Red Army crossed the naturally dangerous Dadu River from the Luding Bridge, shattering Chiang Kai-shek's attempt to annihilate the Red Army south of the Dadu River.