Bus from HK airport to Guangzhou

hi, i need to take a bus from hk international airport to Guangzhou. Here Guangzhou is listed as a destination with eebus. On the official website i cannot find any cross-border busses going to Guangzhou. Also my flight will arrive at 20 pm so the bus needs to leave after that. Is there any other way to get to guangzhou that day? Help is kindly appreciated!