Hi ,How to get macau from guangzhou if we take inter city train ? & how long does it take? Thank you

There is no direct intercity train to Macao, but there are bullet train to Zhuhai.

Take the high-speed train from South railway station to Zhuhai, and the travel time is about 1 hour. Upon arrival, walk about 0.4 miles to the Gongbei Border. Pass the immigration, you will reach macao.