sentences:  On December 30, 1946, the communist 4th Column annihilated the nationalist rear guard, the 67th Brigade on the highway from the town of Pu (蒲) County to Danning (大宁), and following the success, concluded the campaign by taking the town of Pu (蒲) County on January 1, 1947, badly mauling the nationalist defenders in the process.The nationalists lost over 10,000 troops in this defeat, which disrupted the overall plan to attack the communist capital Yan'an, and the original offensive schedule had to be postponed, thus providing the enemy with ample time to evacuate.Furthermore, the southwestern Shanxi was constantly under the enemy threat as a result of the nationalist defeat.