China z visa application.

I am from South Africa and I have been working and living in Cambodia for the past 30 moths. During this time we never left Cambodia. I received a job offer from China as a teacher. Can I , as a South African citizen,apply for my Chinese Z visa at the Chinese Embassy in Phnom Penh.We lived and worked in China until 2016 as teachers with Z visas that was renewed 3 times.