Mrs.Willie, You need a single entry tourist visa to enter Guangzhou and Shenzhen, Hong Kong and Macau apply for different exit & enter controls from Mainland China, Indonesians can visit Hong Kong or Macau for less than 30 days without a visa, therefore, you just need to apply for a single entry tourist visa to Mainland China. You will need the invitation letter from your friend and the copy of his passport and Chinese visa if you will stay in your friend's house, the easy way is to provide the hotel reservation, 1 room for 2 persons is accepted, I guess that 1 room for 6 person is not accepted. The flight ticket from KL - Guangzhou, Macau - KL are sufficent for visa application.