Who's in charge? What legal responsibility should I bear? How negative is it?

according to

Article 11 Where a laborer suffers personal injury in employment activities, the employing unit shall be liable for compensation. If a third person other than the employment relationship causes personal injury to the laborer, the right holder of compensation may request the third person to bear the liability for compensation or the employer to bear the liability for compensation. After the employer assumes the liability for compensation, it may claim compensation from a third party.

Article 9 Where a laborer causes damage to others in employment activities, the employing unit shall be liable for compensation; Workers who cause damage to others due to intentional or gross negligence shall be jointly and severally liable for compensation with the employer. If the employer is jointly and severally liable for compensation, it may claim compensation from the laborer.

Article 17 If the victim suffers personal injury, the compensation obligor shall compensate all expenses such as medical expenses and reduced income caused by absenteeism, including medical expenses, lost time, nursing expenses, transportation expenses, accommodation expenses, hospital food subsidies and necessary nutrition expenses.

If the victim is disabled due to injury, the compensation obligor shall also compensate the necessary expenses incurred due to the increase of daily needs and the income loss caused by the loss of working ability, including disability compensation, disability AIDS, living expenses of the dependents, and necessary rehabilitation expenses, nursing expenses and follow-up treatment expenses actually incurred due to rehabilitation nursing and continuing treatment.

If the victim dies, the compensation obligor shall, in addition to compensating the relevant expenses stipulated in the first paragraph of this article according to the rescue and treatment, also compensate the funeral expenses, living expenses of the dependents, death compensation and other reasonable expenses such as transportation, accommodation, lost time and so on for the funeral expenses of the relatives of the victim.

Therefore, if the younger brother has gross negligence or intention, he shall be jointly and severally liable for compensation with Xie! If not, the employer shall be liable for compensation! This is not a work-related injury, because there is no labor relationship, only employment relationship! Xie is not an employer!