After failing to make significant progress, the nationalists resorted to artillery to shell the enemy, but this resulted in a disastrous failure. The terrain favored the defenders in that there were relatively few artillery positions outside the city for shelling the city, and defenders were well aware these positions. The nationalists enjoyed numerical superiorities in artillery so these positions were jammed with nationalist batteries. The enemy defending the city, on the other hand, had fewer artilleries and thus was forced to move around whenever and wherever they were needed, and such frequent and rapid movement to the next new position where artillery support was needed helped the enemy artilleries from being shelled by the nationalist counter-artillery fire. In contrast, nationalist artillery was the first to fire for most of the time, but after firing, they were not able to move around due to limited positions available and the high concentration of batteries deployed in the few available positions. As a result, the nationalist batteries became victims of enemy counter-artillery fire and suffered great loss. When nationalists were forced to withdraw their batteries from the few available artillery positions to avoid losses, the enemy was out of range. As a result, the attacking nationalists lost the artillery duel. Mao was happy that the nationalist attack was beaten back again, and on April 27, 1946, telegraphed Lin Biao to praise him and his troop, and asked Lin Biao to deploy one or two more regiments to develop Siping into Madrid in the East.