I am flying from Melbourne to Beijing and then straight away by transit from Beijing to Russia. My way back is exactly the same except that I want to stay over in Beijing for a few days. I've applied for a single entry travel visa to China, but I am going to use it only on my way back from Russia to Australia. I am afraid that when I show my visa on my way back, the custom might say that I've already use it on my way to Russia as there will be an arrival stamp in my passport. Any chance to avoid that?