E-commerce has transformed the way in which people shop; and the introduction of modified logistics chains has profoundly influenced the retail industry. Changes in the logistic chains of e-commerce created uncertainty regarding the energy efficiency of this new business model. This paper compares the energy efficiency of logistics chains in China between traditional retailing and e-commerce models across a range of products that are mostly bought online. The results show that the percentage of airfreight used for transportation and the distribution distance in the e-commerce model has a strong influence on the overall energy efficiency of e-commerce logistics chains. Items Size Weight Value Clothing/shoes Small Light Low Audiovisual products Health & beauty items General merchandise Medium Medium Low Groceries Computer equipment Medium Medium Medium Communication devices and other digital products Small Light Medium White goods Large Heavy High Books Small Medium Low Source: Author's analysis. The determination of the average size and weight ranges of the products is based on packaging advice provided by DHL Size and Price Guide (DHL n.d.). Accordingly, the product can be classified as small if it can fit into a 337 x 322 x 180 millimetre (mm) box, medium if it can fit into a 481 x 404 x 389 mm box and large if it cannot fit into a 481 x 404 x 389 mm box. The product could be classified as light if it weighs less than five kilograms (kg), medium-weight if it weighs between five and 20 kg and heavy if it weighs more than 20 kg.

By using the smiling curve of Global Value Chain and China's cases from Zephyr database during 1997-2017, this paper depicted the ongoing OFDI motives of emerging economies. Through the mapping analysis, the GVC reconstruction tested crucially in OFDI motives forming mechanism. Different GVC process paralleled diversified OFDI motives. The case of China embraced those new motives, promoting by national strategy, grasping the Global Value Chain, safeguarding strategy asset security, are ultimately complement to the traditional motives analysis system. Statistics also showed the complexity of OFDI motives. The stability and sustainability of OFDI increasing from Emerging economies still relied on the highly growth of those new motives OFDI.