The criminal litigation evidence immunity system is an important part of the modern country under the rule of the evidence system, is the obligation to testify in the court added and restrictions on the witness. The current criminal procedure law of all countries in the world generally privileges established as one of the basic rights of witness. But in our country law, exempt right system still in deficiency. The significance of construction of perfect free card right system, it can not only promote China's current evidence legislation, but also in the witness protection of basic human rights, the role can not be ignored the maintenance of family and social relations stable and the protection of public interests, it established the exempt right system in our country's criminal procedure law is necessary. This paper from the perspective of the evidentiary privileges, expounded the basic free card right concept, characteristics, introduces the preliminary evidence immunity, theoretical basis and value basis and deep set of privileges, finally will return to China problem, based on the conditions of our country, put forward the idea of free card right system.

中国是世界上图书市场潜力最大、增长最快的国家，近年一直是以两位数的速度增长。图书具有品种繁多、单价不高、外部形态标准、通过传递知识信息来满足读者需求等特点，使它成为最适合在网上销售的商品之一。 网上书店是现代信息技术与图书发行理念相结合的产物，是图书出版发行的新型渠道。网上书店有很多营销方式，本文主要通过长尾理论研究网上书店营销方式中的的博客营销方式。博客营销基于博客的集聚性、互动性、知识性、自主性和共享性的特点及其赖以运行的网络载体可以有效地实现与顾客的一对一互动式沟通，有助于提高沟通效果，由于免费博客可以降低营销费用，可以增强知识积累，提升品牌形象从而从某种途径上避免被竞争者超越。因此，目前很多企业开展了博客营销。网络中的个性化程度很高，每个人都因自己的生活背景和文化阅历产生不同的需求，而这些需求往往是有很大差异的。而这种差异往往在传统的领域体现的不是很明显，而因网络的特殊性是这种差异性得以放大，从而有了长尾带来的可观利润。目前长尾理论在网络中得到了广泛的应用和证明。 虽然目前对于网上书店，博客营销，长尾理论的研究很多，但把三者结合起来的研究就目前而言是挺少的。本文把这三者有机的结合起来，通过研究长尾理论，把长尾理论运用到网上书店的博客营销中去。根据长尾理论的观点提出网上书店博客营销的具体做法，从而为网上书店博客营销找出一个理论依据。 China is the world's book market with the greatest potential, the fastest-growing country in recent years has always been a double-digit growth rate. With a wide variety of books, price is not high, the external form of standards, by passing a knowledge and information to meet the demand characteristics of the reader, making it the most suitable for online sales of commodities. Online bookstore is a modern concept of information technology and book publishing product of the combination is a new type of book publication and distribution channels. There are many methods of marketing online bookstore, this article mainly through the long tail theory of marketing in the way the online bookstore of blog marketing. Blog marketing blog based on the gathering, interactive, knowledge, autonomy and sharing of characteristics and which runs a network carrier can be effectively achieved with customers one on one interactive communication, help to improve communication effectiveness Since free blog can reduce marketing costs, can enhance the accumulation of knowledge, enhance brand image and thus a certain way to avoid being on the competitors beyond. Therefore, the present, many enterprises to develop a blog marketing. In the network a high degree of personalization and everyone because of his background and cultural experience of life have different needs, and these needs are often very different. And this difference is often reflected in the traditional areas is not very obvious, but because of the special nature of the network of such differences can be amplified and thus have a long tail caused by a handsome profit. Long Tail Theory is currently in the network has been widely used and proved. Although for the online bookstore, blog marketing, Long Tail theory, research a lot, but the combination of the three for now is quite small. This combination of these three organic through research long tail theory, the long tail theory apply to the online bookstore's blog marketing to go. According to long-tail theory, put forward the views of a specific online bookstore blog marketing practices, so as to online bookstores to find a theoretical basis for blog marketing.