You can find the direct bus to Mong Kok and Jordan at Canton Building, Guangzhou Hotel and President Hotel, To SHeung Shui, Edward Prince, Hung HOm, Central, Tsuen Wan, Wanchai etc. at Guangzhou's Marriott China Hote, Huaxia Hotel, White Swan Hotel. You can buy the ticket at the pick-up points and if you stay in those hotels, it is much easier. You can also get to Guangzhou East Railway Station to catch the direct train to Hung hom Station in Hong Kong. This way will be faster than bus.