Is possilble to have two transit visas? Korea - Shangai - Macau - Beijing - Brazil

I was in Korea and I arrived in Shangai 27th July, I got a transit type for 72 hours. On 30th July (before expire 72 hours) I'm going to Macau (stay there all day long) and then I'm going to Beijing on 30th July at night and I depart from Beijing to Brazil (my country) on 1st August. Is there any problem issue two, one in Shangai and one in Beijing?

Best Regards, Vitor Andrade