12. Intangible assets, net

Intangible assets, net, consist of the following:

	As of December 31, 2013				As of December 31, 2014
	Gross Carrying Amount	Accumulated Amortization		Net Carrying Amount	Gross Carrying Amount	Accumulated Amortization		Net Carrying Amount
	RMB				RMB
Strategic Cooperation	—	—		—	6,075,289	(915,455	)	5,159,834
Non-compete	—	—		—	1,447,189	(146,364	)	1,300,825
Technology	—	—		—	110,900	(17,965	)	92,935
Advertising customer relationship	—	—		—	80,400	(9,283	)	71,117
Domain names and trademark	40,353	(5,926	)	34,427	79,969	(12,447	)	67,522
Logistic workforce	—	—		—	13,900	(3,745	)	10,155
Online payment and other licenses	189,000	(14,700	)	174,300	189,000	(27,300	)	161,700
Copyrights	17,805	(10,730	)	7,075	28,873	(15,014	)	13,859
Total	247,158	(31,356	)	215,802	8,025,520	(1,147,573	)	6,877,947

Amortization expenses for intangible assets were RMB6,888, RMB24,228 and RMB1,116,217 for the years ended December 31, 2012, 2013 and 2014, respectively.

As of December 31, 2014, amortization expenses related to the intangible assets for future periods are estimated to be as follows:

	For the years ended December 31,
	2015	2016	2017	2018	2019	2020 and thereafter
	RMB	RMB	RMB	RMB	RMB	RMB
Amortization expenses	1,457,322	1,455,765	1,451,273	1,450,343	517,711	545,533