Ⅰ.Quality guarantee period of QD32/4D series products

Sorts	spare parts
Ⅰ	Cylinder-block| cylinder-head| crankshaft| connect-rod assembly |Flywheel shell
	equipment with vehicles guarantee time （M） guarantee miles （km） Light-truck 24 250000 light-bus 24 250000 multi-function business-affairs bus 24 250000 Engineering vehicles 12 　 selling single engine 12
Ⅱ	piston|piston pin|camshaft|connect-rod bolt|inlet and outlet valve|valve seat|valve spring|valve guide|valve tappet|Valve push-rod|rocket-arm|timing gear|oil-pump|water pump|Fly-wheel|high pressure oil pump|injector|oil-sump|fuel pipe line|Oil cooler|generator|supercharger assembly|starter|servo-assist pump|gear-chamber cove|vacuum pump assembly|exhaust-gas recirculation controller
	equipment with vehicles guarantee time （M） guarantee miles （km） Light-truck 18 60000 light-bus 18 60000 multi-function business-affairs bus 18 60000 Engineering vehicles 10 　 selling single engine 10
Ⅲ	Piston ring|valve rocker-arm shaft|crankshaft shell|connect-rod shell|front and rear oil seal of crankshaft|camshaft bush|absorber|inlet-pipe |exhaust-pipe|oil-filter assembly |fan assembly | preheating controller assembly
	equipment with vehicles guarantee time （M） guarantee miles （km） Light-truck 12 40000 light-bus 12 40000 multi-function business-affairs bus 12 40000 Engineering vehicles 6 　 selling single engine 6
Ⅳ	all kinds of belt | cylinder gasket | all kinds of induction stoppers
	equipment with vehicles guarantee time （M） guarantee miles （km） Light-truck 6 20000 light-bus 6 20000 multi-function business-affairs bus 6 20000 Engineering vehicles 3 　 selling single engine 3

Note: It is with guarantee time and guarantee miles two items in production quality guarantee rules, if it has one item to go beyond, we regarded it as going beyond guarantee period.

Ⅱ.Quality guarantee period of 100/102/105 series products

sorts	spare parts
Ⅰ	Cylinder-block | cylinder-head | crankshaft | camshaft | connect-rod | Flywheel | Fly-wheel shell | gear-chamber | Oil-sump | clutch-shell | clutch | absorber | inlet pipe | exhaust pipe | oil-cooler sump | oil-filter assembly | fuel filter assembly
	equipment with vehicles guarantee time （M） guarantee miles （km） truck/passenger car 18 100000 rear bus 18 100000 city public bus 12 50000 engineering vehicles 12 　 Automatic discharging vehicle 12 　 harvester 12 　 agriculture vehicle 12 30000 Selling single engine 12
Ⅱ	inlet valve | exhaust valve | valve pipe | inlet seat | exhaust-seat | piston | piston pin | cylinder-sleeve | tappet | push-rod | gear-chamber cover | all kinds of gear | fly-wheel gear ring | oil pump | water pump | pressure pump | injection pump | injector | generator | starter | supercharger | steering servo-assist pump | vacuum pump connect-rod bolt | high pressure oil pipe | Oil cooler
	equipment with vehicles guarantee time （M） guarantee miles （km） truck/passenger car 12 50000 rear bus 12 50000 city public bus 12 50000 engineering vehicles 10 　 Automatic discharging vehicle 10 　 harvester 10 　 agriculture vehicle 8 20000 Selling single engine 6
Ⅲ	Piston ring | main-bearing | thrust bearing |connect-rod bearing | friction piece | front and rear oil seal | camshaft bearing | valve spring | all kinds of pipes |
	equipment with vehicles guarantee time （M） guarantee miles （km） truck/passenger car 6 10000 rear bus 6 10000 city public bus 6 10000 engineering vehicles 3 　 Automatic discharging vehicle 3 　 harvester 3 　 agriculture vehicle 3 10000 Selling single engine 3
Ⅳ	valve seal sleeve | all kinds of seal glue gasket | rubber ring | Belt | cylinder-gasket | all kinds of induction plug |
	equipment with vehicles guarantee time （M） guarantee miles （km） truck/passenger car 3 10000 rear bus 3 10000 city public bus 3 10000 engineering vehicles 2 　 Automatic discharging vehicle 2 　 harvester 2 　 agriculture vehicle 2 5000 Selling single engine 2

Note: It is with guarantee time and guarantee miles two items in production quality guarantee rules, if it has one item to go beyond, we regarded it as going beyond guarantee period.

After service quality guarantee system of DCD

There are 26 stationed office, three grade service network management which more than 600 service center opened by DCD in China. We will supply high quality service about "initiative, rapidity, availability" on time.
DCD knew about the essence of "after-sale service creates permanent customers". For many years, after-sale service quality guarantee system of DCD formed sale and service network of smallest service radius, best service quality, and fastest service speed in the same industry all over China, and it is satisfied with customers. During treating with customers' guarantee and significant counterclaim, we unremitting regarded quality as the first and customer's satisfying as service tenet and service ideal of serve with whole heart and satisfaction accompanies the whole way and treated with preferably all kinds of different types technical service of guarantee service. So it played mutual benefit and reached the aim of cement and opening market by quality service.

Ⅰ.The main measurements of DCD after-sale service:
1. Every year we hold service propaganda month on Spring and Autumn in the service network. The staff of 26 offices with more than 600 maintain centers interviewed stock company, Jianghui and ect the main automobiles factory and agent, and interviewed emphases customers and we will present free oil and spare parts.
2. The maintenance mile of CY diesel engine is one hundred thousand miles and 18 months.
3.To carry out dynamic management to service system, superior is successful and inferior is eliminated, and continuous to integrated quality of improve service network.
4.To develop "five one" project, and develop service station to interview investigate and training working of service appraisal persons in order to exert sufficiency excellent service station and excellent appraisal persons service for customers to establish base.
5.To continuous to increase interview of offices to emphasis customers and Doongfeng Automobile Stock Company, Jianghui, Yuejin, Futian and ect main automobile factory and agency.
6.To carry out regularly to answer examination paper of customer's satisfaction investigation about automobile agency and the main customers.

Ⅱ.Improving measures of DCD guarantee service in 2005
During guarantee service in 2005, with call center information network program perfecting continuously, DCD realized share with information of company's quality information system, and realized modernize of network office by CRM stratagem, and continuous to perfect assess of service system and customer's interview. And we must keep on increasing assess of service station, and continuous to increase service level of service station and customer's satisfaction. To reduce establishing files, analysis and improving measures of vicious claim indemnity rate of engine. To invite automobile to look for questions of DCD engine and ect., and increasing service work and solve customers' complaining in order to continuous to increase customers' satisfaction and loyalism to our productions.