 On June 9, 1947, the enemy had completed its regroup outside the city for the upcoming attack.However, the communist made a serious intelligence blunder in underestimating the defenders' strength by only assessing the total nationalist strength as 18,000, and even Lin Biao had erroneously believed that there were only four fully combat capable nationalist regiments with full strength in the city.The enemy had missed the significant intelligence including the defenders receiving airdrop of 400 tons of supplies and weaponry in more than 200 sorties from Shenyang, and the rapid new construction of the fortifications.