5. Prepayment and Other Current Assets

The following is a summary of prepayment and other current assets:


	As of December 31,
	2010		2011		2011
	RMB		RMB		US$
Prepaid rental and deposit		3,405		4,634		736
Prepayment to suppliers and other business related expenses		14,442		30,265		4,809
Receivable related to exercise of employee option		—		10,924		1,736
Others		1,542		511		81

Total		19,389		46,334		7,362

Prepayment to suppliers and other business related expenses mainly consist of business related staff advance, and the Group’s prepaid content licenses fee to third-party content suppliers for the rights to access and present on the Group’s website the contents produced by these suppliers during a certain period. These content licenses generally have a licensing period of one to three years, and are amortized over the license period on a straight-line basis. The portion of the prepaid content license cost that relates a license period that is more than 12 months from the balance sheet dates are classified as other non-current asset. Receivable related to exercise of employee option mainly includes the receivable from the option exercise agency which amount was collected in January 2012.