This is the 3010th most frequent Chinese word.
肩
Shoulder.
In this sentence, '肩' (shoulder) is used literally to denote the physical part of the body where the luggage is placed.
我扛起了沉重的行李做在肩上。
I carried the heavy luggage on my shoulder.
Here, '肩' (shoulder) is used metaphorically to describe the closeness or unity between people, as walking shoulder to shoulder symbolizes harmonious companionship.
当时我们肩并肩地一起走过了那条小路。
At that time, we walked down the path shoulder to shoulder together.
In this usage, '肩' implies taking on responsibility or an obligation, metaphorically referring to one's shoulders bearing the weight of duties or missions.