You can check the ticket information for the train to Bird Island on the 12306 official website or mobile app. Normally, if there is a direct train to Bird Island during May and June you mentioned, you should be able to check the relevant train information on 12306. However, since the actual situation may change, it is recommended that you pay attention to the latest official news in advance to ensure that you can purchase tickets smoothly. If you cannot find relevant information on 12306, you may need to go to an offline ticket purchase point or consult the local railway department.