皮开肉绽 skin split and flesh exposed
Explanation
形容伤势很严重，皮肉都裂开了。常用来形容受残酷拷打后所受的伤。
Describes a very serious injury where the skin is torn and flesh wounds are present. It is often used to describe the injuries sustained after brutal torture.
Origin Story
传说在古代，有一个名叫李白的书生，他天生聪颖，文采过人。一次，他去参加科举考试，途中不幸遇到山贼打劫，被山贼头目抓了起来，严刑拷打。李白为了保住性命，只得编造谎言，谎称自己家中有巨额家产，只要放他回去，他就会将家产奉上。山贼头目贪财，便答应了李白的请求，将他放了。李白回到家中，便立即写了一封信，派人送给了官府，请求官府派兵剿灭山贼。官府得知消息后，立即派出军队，将山贼一网打尽。李白因机智勇敢，最终逃脱了山贼的魔爪，但也被折磨得皮开肉绽，遍体鳞伤。从此以后，李白便痛恨山贼，决心用自己的文采和智慧，为民除害。
Legend has it that in ancient times, there was a scholar named Li Bai who was naturally intelligent and talented. Once, he went to take the civil service exam, but on the way, he was unfortunately robbed by bandits and captured by their leader, who tortured him severely. To save his life, Li Bai had to make up a lie, claiming that he had a huge fortune at home. If they would let him go, he would give them the fortune. The bandit leader was greedy for money and agreed to Li Bai's request, releasing him. Li Bai returned home and immediately wrote a letter, which he sent to the government, requesting that they send troops to wipe out the bandits. Upon receiving the news, the government immediately dispatched troops, who captured and eradicated the bandits. Li Bai escaped the clutches of the bandits thanks to his intelligence and courage, but he was also tortured, leaving his skin torn and his body covered in wounds. From that day on, Li Bai hated bandits and resolved to use his literary talent and wisdom to protect the people.
Usage
这个成语主要用来形容遭受残酷拷打后所受的严重伤势，也可用作比喻，形容某项工作或任务的难度和艰辛。
This idiom is mainly used to describe the serious injuries suffered after being subjected to brutal torture. It can also be used metaphorically to describe the difficulty and hardship of a particular task or work.
Examples
-
他被严刑拷打得皮开肉绽，遍体鳞伤。
ta bei yan xing kao da de pi kai rou zhan, bian ti lin shang.
He was tortured so badly that his skin was torn and he had flesh wounds.
-
这场比赛中，他拼尽全力，最终以皮开肉绽的代价取得了胜利。
zhe chang bi sai zhong, ta pin jin quan li, zui zhong yi pi kai rou zhan de dai jia qu de le sheng li.
In this competition, he gave his all, and ultimately won, but at the cost of severe injuries.