Q: I am flying to Hong Kong and then taking train to Guangzhou. Do I need to provide you with the train booking to apply for China visa?
As your final destination is Guangzhou which is not far from HK, we do not need train or flight reservation from Hong Kong to Guangzhou. If the destination would be further away, then yes. In your case just provide a copy of the return ticket to Hong Kong along with the hotel booking in mainland China and in the section 3.7 of China visa application form indicate that you are taking train from Hong Kong to Guangzhou and back.
I am flying to Hong Kong and then taking train to Guangzhou. Do I need to provide you with the train booking to apply for China visa?
As your final destination is Guangzhou which is not far from HK, we do not need train or flight reservation from Hong Kong to Guangzhou. If the destination would be further away, then yes. In your case just provide a copy of the return ticket to Hong Kong along with the hotel booking in mainland China and in the section 3.7 of China visa application form indicate that you are taking train from Hong Kong to Guangzhou and back.