I have planned to travel from Kuala Lumpur to Macau, Hong Kong, Shenzhen, and Guilin. Do I need Single or Double entry Chinese Visa? Can I use Chinese visa to enter Macau?

I am Indonesia passport holder. I have planned to travel from Kuala Lumpur to Macau, Hong Kong, Shenzhen, and Guilin respectively. I will be back to Kuala Lumpur from Guilin.
1. What kind of Chinese visa do I need (Single or Double entry)?
2. When I arrive in Macau, should I apply Macau visa (again) or Can I use Chinese visa to enter Macau?

Thanks and Regards,
Melisa