Mystery stone [????- ] | Gwulo: Old Hong Kong

Mystery stone [????- ]

Current condition: 
Ruin

Can't read any letters or figures on it, though it seems that there are inscriptions on two sides.

IMG_20210325_RBLStone.jpg
IMG_20210325_RBLStone.jpg, by H.Lo
IMG_20210325_RBLStone2.jpg
IMG_20210325_RBLStone2.jpg, by H.Lo