How did Zhang Liang, the first counselor in the Western Han Dynasty, succeed and retire under Liu Ba

So it's Zhang Liang's Life experience is closely related to this Qinling Mountains back then Xiang Yu fought hard against the Qin army in the Battle of Julu Attracted the main force of the Qin army At that time, Liu Bang was preparing to attack Guanzhong. It ended up at Yaoguan. Encountered Qin Jun guarding I can't pass this pass you need to know Yaoguan happens to be controlled by Nanyang The traffic arteries leading to the Qinling Mountains So if this place is under control Then it will be difficult for Liu Bang to achieve his goal at this time Zhang Liang came to give advice to Liu Bang He said Qin Bing went to the wall Wei Keqing Chen Wen Qi general apprentice son ancient art also move to stand What's the meaning Zhang Liang analyzed it and said, we have to use soft moves What soft move? you bluff with great fanfare Yibin Let the enemy not know how many soldiers you have one of two I heard that the guard's general is the son of a butcher Born into a Shang family Such a person easily moved by interests So you should be bringing gold and silver treasure now to bribe him Sure enough Liu Bang sent people to bribe Qin Guan guards with gold and silver treasures This Shoujiang Qin was moved when he saw it. Finally agreed to surrender Liu Bang and agreed He said he was going to attack Xianyang with Liu Bang Then Liu Bang was very happy But Zhang Liang has another idea this time. Zhang Liang said that the guards are the generals Willing to surrender our soldiers may not be Why don't we just do this While they thought they had a deal with us let down your guard Why don't we sneak up on them now As a result, Liu Bang listened Zhang Liang's suggestion Suddenly launched an attack on Yaoguan Qin Jun was caught off guard Then retreated to Lantian Then Liu Bang pursued to Lantian Defeat the Qin army again Now No one can defend Liu Bang anymore Liu Bang led a mighty army to the city of Xianyang And Prince Qin's meat blanket came out after hearing the news The Qin Dynasty officially declared its demise Then the later history is more familiar to everyone. Xiang Yu is here Xiang Yu became a prince Sealed Liu Bang to Bashu It was Zhang Liang who gave the advice Ask Liu Bang to bribe Xiang Bo with a lot of money Let Xiang Bo speak well in front of Xiang Yu As a result, Xiang Yu took Liu Bang changed his seal to this Hanzhong he sealed him there Then Xiang Yu led the army and withdrew And what is Zhang Liang's suggestion to Liu Bang? just say you When withdrawing to Hanzhong this way you walk He burned the plank road behind him This is another clever plan by Zhang Liang what he actually knows Xiang Yu has always been worried about Liu Bang So now you have sealed me in Hanzhong I'm walking While burning down the plank road from Hanzhong to Guanzhong Actually Paralyzed Xiang Yu Let Xiang Yu mistakenly think that Liu Bang has no ambitions I don't plan to come to Guanzhong again. I just want to spend my whole life in Hanzhong Be obedient and be a prince I'm still worried that you guys are coming to beat me So I burned the battle lane that's what it means actually paralyzed Then Liu Bang followed Zhang Liang's suggestion. Then we also learned later that there is a so-called secret but Frankly speaking, when this incident happened Zhang Liang is not at Liu Bang's side Later Zhang Liangcai returned to Liu Bang's side Then help Liu Bang make plans Finally defeated Xiang Yu Founded the Han Dynasty