The Chinese, smarting under their losses at Chin-sen, and stung by the gibes of the Coreans, now hastened to Uru-san, to swallow up the Japanese. The Corean army, which had been collecting around the Japanese camps, were soon joined by the advance guard of the Ming army. The arrival of the Chinese forces was made known in the following manner. A Japanese captain commanded one of the advance pickets, which had their quarters in the cloisters of Ankokuji (Temple of the Peaceful Country). One night a board, inscribed with Chinese characters, was set up before the gate of the camp. The soldiers, seeing it in the morning, but unable to read Chinese, carried it to their captain, who handed it to his priest-secretary. The board contained a warning that the Chinese were near and would soon attack Uru-san. Betraying no emotion and saying nothing, the captain soon after declared himself on the sick-list, and secretly absconded to Fusan. The truth was, that an overwhelming Ming army was now in front of them and their purpose to invest the castle was thus published. The entire Japanese forces were now gathered close under the walls, or inside the castle, and the sentinels were doubled. On the morning of January 30th the Ming army suddenly assaulted the castle. A small detachment, evidently a decoy and forlorn hope, attempting to scale the walls, was driven back by the matchlock men and began to retreat. Seeing this, the Japanese recklessly opened the barbican gate and began pursuit of their enemies, thinking they were only Coreans. Lured on to a distance, they suddenly found themselves encircled by a mighty host. By their black and yellow standards, and their excellent tactics, the Japanese officers saw that they were Ming soldiers. The dust raised by the horses of the oncoming enemy seemed to the garrison as high as Atago Mountain in Japan. They now knew that eighty thousand Chinese were before their gates. Only after hard fighting, was the remnant of the Japanese sortie enabled to get back within the castle, while the allies, surrounding the walls, fought as fiercely as if they intended to take it by immediate assault. Some of the bravest leaders of the garrison fell outside, but no sooner were the gates locked than Katsuyoshi, without extracting the two arrows from his wounds, or stanching the blood, posted the defenders on the walls in position. Ogawuchi had performed the hazardous feat of sallying out and firing most of the outside camps. He re-entered the castle with arrows in his clothes, but received no wounds. The battle raged until night, when the Chinese drew off.