ér​qiě HSK2

and

Senses

而且 ér​qiě and

Used to connect words or phrases of equal status to show a coordinate relation; and; as well as

而且 ér​qiě moreover

Used to connect clauses or phrases to show a progressive relation; furthermore; in addition; often used with 不仅 bù​jǐn or 不但 bù​dàn in the pattern "not only... but also..."

References

see 不但/不但 而且/而且
abbreviation 且/且 而且/而且
synonym 抑且/抑且 而且/而且