guān / yú / Zhāng / Bǎo / de / shǐ / liào / bù / duō / wǒ / men / zhǐ / néng / cóng / shǐ / shū / zhōng / liǎo / jiě / tā

关于张宝的史料不多，我们只能从史书中了解他。

There are not many historical records about Zhang Bao; we can only learn about him from historical books.