Why didn't Zhuge Liang burn Fu Jia's army so cruelly in the Three Kingdoms?

What are rattan nails? It is made of wild vines growing in the southwest wilderness of China, processed by skilled craftsmen and soaked in tung oil. It took 7749 days to finish.

Rattan armor is light and strong, good at preventing arrows, invulnerable to bullets and unsinkable in water, so it is invincible on the battlefield. Zhuge Liang pacified the south, and if he confronted Fujia, it could be said that he was helpless. Zhuge Liang is a clever man. He is proficient in the Five Elements and Daoism. He can only use fire to deal with rattan armor, knowing that he is cruel and has to use it.

Secondly, the strength of Shu Han is actually very weak. There are few generals, few troops and small territory. Zhuge Liang's enemies are mostly weak and strong. Zhuge Liang is also a strategist and strategist. He is good at tricks. He ripens him with fire. He once burned Wang Bo, Xintian and Chibi. Now, when he saw Fu Jia's army, he naturally thought of defeating the strong with the weak.

Thirdly, the geographical environment of southwest China is dominated by grassland jungle, especially Bashu area, or Jiangnan water town, which is basically green, without today's cement floor, which is very suitable for the spread of fire. It is important to arrange troops for the generals. In this geographical environment, it is very appropriate to use fire attack against Fu Jiajun.

Fourth, Zhuge Liang was proficient in astronomy and was the best weatherman in the Three Kingdoms period. He has a fairly accurate grasp of the weather changes. Battle of Red Cliffs can find out what the wind is months in advance, and the fire attack pays the most attention to the use of the wind. Zhuge Liang planned to attack with fire, and had figured out what wind would blow, so Meng Huo's Fu Jia army was doomed.