According to Official Guinness Records,
The largest cup percussion ensemble consists of 2,398 participants and was achieved by Du Tianlu (China) in Xi'an, Shaanxi, China, on 21 May 2017.The cup percussion performed the rhythm of a song ("Pursuing") which was composed and sung by the record holder, lasting for 6 minutes and 5 seconds'. The record was achieved on their second attempt.
For a complete list of 2017 records, please visit 2017 Guinness Records in China.