On the seaside cliff.
In the second-last circle, Liu Zilang found a camping spot behind a boulder next to the cliff.
There, he was guarded against opponents from his right and his back. With the boulder in front of him and the cliff on his left, no one could get close to him.
He wielded the MK14 he had looted from Karl in his hands. On the other hand, on his back was an exaggeratedly big crossbow. He had thrown away his M16.
The MK14 was fully automatic. Not only did it have superior firepower compared to the M16, but its bullet speed and firing rate were also not that much slower. Hence, this superior gun was an obvious choice for him.
As for why he still carried the crossbow, the element of stealth was important in the final circles of a solo match. The key to winning was to kill people without anyone else noticing.
The crossbow's strengths shone in such moments.
Of course, the prerequisite was that one's aim had to be accurate.