How long does it take from Nan 'an to Nanning by bus?

I only know that it's usually six in the afternoon and four in the morning in Guangzhou. It's only 1200 km away from us. I want you to get on the bus at seven or eight and arrive at ninety tomorrow morning. It won't be too bad when we arrive. 13+04 hours. He usually doesn't get on the highway immediately, but will pull customers in Fujian, which may take 3.4 hours.