Please pay attention to the Pinyin Final (韵母) - 'ao' this Chinese character '包' carries, which connect it with the other example symbols.
pinyin: bāo; means to wrap sth. up with paper, cloth etc.

Chinese phrase: 书包 shū bāo - school bag

Examples:

抱 pinyin: bào; means to hold or carry in one's arms
Chinese phrase: 拥抱 yōng bào - to hug


炮 pinyin: pào; means artillery piece, a kind of heavy weapons
Chinese phrase: 大炮 dà pào - cannon