There are several reasons for the success of borrowing arrows from grass boats.

There are three reasons: first, Zhuge Liang is proficient in astronomy and meteorology and can only borrow arrows in foggy weather. Second, he took advantage of Cao Cao's cautious and suspicious character. Because of the fog, Cao couldn't see clearly the actual situation, so he didn't dare to send troops easily, so he could only shoot arrows. Third, he is thoughtful and cleverly arranged. Twenty boats connected by Zhuge Liang with ropes were arranged one by one, and arrows were collected on both sides.

This is the reason why he successfully borrowed an arrow.

Zhuge Liang: resourceful and ingenious.

First, he has calculated that there will be heavy fog on the third night, so he will successfully borrow an arrow and return home with a full load.

Second, he can already calculate how many boats and grass handles he needs, so he will carry more than 100 thousand arrows no more or less.

Third, he knew that Cao Cao was suspicious, so he would boldly borrow an arrow from Cao Cao.

Fourth, he knew that Lu Su was an honest man, so he borrowed his boat, sergeant and straw handle.

Fifth, he knows that Zhou Yu is very clever. If he hadn't told Lu Su, Zhou Yu would have guessed Zhuge Liang's coup and would have stopped and destroyed his plan. In this way, he was framed by Zhou Yu.

Sixth, he knew that Zhou Yu was going to frame him, but he still played along. But in order not to hurt the spirit, the overall situation, in the dark gave Zhou Yu a color to see.

Seventh, he ordered the grass boat to be connected with ropes and arranged in a row. In the process of borrowing arrows, he also ordered the bow to be transferred to receive more arrows.

These are the reasons why he successfully borrowed an arrow.