My internet connection (here) is not stable. Among them, calligraphy is one of the most valued art forms .

我这网络不稳定 - I this internet not stable My internet connect isn't stable here 而其中的书法是最受重视的艺术之一 - And amongst (these arts?) calligraphy (is) regarded the most important arts one of And amongst there (arts?)*, calligraphy is regarded as one of the most important/valued the most *No way to tell what this noun should be without context. I presume the speaker is talking about arts? Or they might be talking about pieces of Chinese culture? No way to tell.