Macau to Guangzhou to Hongkong

I am Indian going for holidays. I am going to Macau for 3 days. From Macau I am planning to go Guangzhou by train for less than 72 hours. From Guangzhou I will enter Hongkong by train for 3 days.
From Hongkong back to India.
For Macau & Hongkong I read they don't require Visa for 14 & 30 days. But did I need entry permit for Guangzhou for 3 days.