Whether a 54-year-old senior citizen can buy 3 large and 1 small group tickets for Qixing Sea World needs to be determined according to the specific regulations of the attraction. Generally speaking, if it is stipulated that only those aged 55 and above can purchase senior tickets, then 54-year-olds may not be eligible. It is recommended that you contact the customer service of Qixinghai World directly or check the official announcement to obtain the most accurate information.