The reasons why the trunk cannot be opened are as follows: 1. The trunk linkage rod or lock cylinder is broken. 2. The trunk is not unlocked. 3. Trunk lock mechanical parts failure. 4. The boot latch is broken. 5. The trunk door lock switch is broken, etc.

解決方法：

resolvent:

1、連動桿或者鎖芯問題：如果經常是用鑰匙打后箱蓋的，那是連動桿斷了，到修理廠去開。如一直是用搖控器開后箱蓋的，那是鎖芯臟了或生銹了，用除銹劑往鎖芯里噴幾次就能打開。

1. Linkage rod or lock cylinder problem: if you often use the key to open the trunk cover, the linkage rod is broken. Go to the repair shop to open it. If the trunk cover is always opened with the remote control, the lock cylinder is dirty or rusty. Spray rust remover into the lock cylinder several times to open it.

2、沒有解鎖：沒有用遙控鑰匙解鎖，所以會很難打開。打開前要按下鑰匙的開啟按鈕，或者看看是不是鑰匙電池沒電。

2. No unlocking: it is not unlocked with the remote key, so it will be difficult to open. Press the start button of the key before opening it, or see if the key battery is dead.

3、機體零件故障：后備箱本身出問題，比如，后備箱的線斷了或者是其他后備箱原因導致汽車后備箱打不開。

3. Body parts failure: there is a problem with the trunk itself. For example, the trunk line is broken or the trunk cannot be opened due to other trunk reasons.

4、五門車一般無法從內部開啟：像一些硬派越野車，為了防止在行駛中誤觸，可能會造成人員的傷亡，一般車內是不會設置后備箱開關的，所以只能在車外開啟。

4. Five door vehicles generally cannot be opened from the inside: like some hardline off-road vehicles, in order to prevent accidental contact during driving, which may cause casualties, the trunk switch is generally not set in the vehicle, so it can only be opened outside the vehicle.