So how to apply for visa in India and what is the fees?

You may just go to the embassy or consulate of China in India to submit your application directly. Or if it's not convenient for you to go in person, you may entrust a friend or a travel agency. The visa fee for a single entry one is RS. 3,000.

Dear Sir, Thanks for your reply. Do i have to submitt any other document other than the application. I have booked the air ticket upto hong kong from chennai and return. I like to travel to Shenzhen by train or Bus from Hong Kong. So how to put entry in my passport. But i need to book a budget hotel in Shenzhen to stay for 7nights. So can you help me this hotel booking. I want to stay near the Main Electronics Market in Shenzhen.

You have to provide your valid passport, a truly filled application form, round-trip air ticket, hotel booking and a recent-taken passport standard photo for the application. There are branch offices of Shenzhen Immigration Department at the entry port to stamp the entry record on your passport.

Dear Madam, Thanks for your reply. Madam can you help me finding a Budget Hotel in Shenzhen to stay.

Considering your requirements, I'd like to recommend you Xin Xiangyu Hotel located at No. Zhenxing Road Futian, Shenzhen, which is very near to Huangqiangbei Electronics market.