yǐ​jí HSK4

as well as

以及 yǐ​jí
as well as conjunction
used to connect coordinate words, phrases, or clauses, often with the latter being less important

You must accept your failures as well as your successes.

Frequency

Movie subtitles
107.6 per million appears in 31% of films
Written text
399.3 per million

Details

HSK 2.0
Level 5
HSK 3.0
Level 4

Sources