在美中贸易摩擦不断升级背景下提高越南—中国投资贸易合作的效果

美中贸易摩擦自2018年发生以来,对包括越南—中国投资贸易合作关系在内的世界经济产生重大影响。本文旨在对美中贸易摩擦背景下的越中投资贸易合作做一个总体评价,并就新的背景下提高越中投资贸易合作的效果提出一些建议。

Studies on Rapid Extension of Guangxi Hybrid Rice Varieties in Vietnam

Based on the similarity in geographic and climatic conditions between Guangxi and Vietnam, a new extension model, i.e., variety prescreening test in Nanning-variety screening tests in Vietnam-multi-location test and demonstration in Vietnam-commercial production in Vietnam, was put forward for rapid extension of the hybrid rice varieties from Guangxi, China in Vietnam. Through practice, this model had a very good effect on a group of hybrid rice varieties like Teyou 136 selected for rapid extension in Vietnam. Besides, some suggestions were offered for the extension of Guangxi hybrid rice varieties in Vietnam.

Agyrius watanabeorum Ishikawa, a New Record Genus and Species from China and Vietnam(Hemiptera: Reduviidae)

The little known harpactorine species, Agyrius watanabeorum Ishikawa, 2002, is redescribed based on the material from China and Vietnam. The characters of phallus are reported for the first time. The dorsal habitus, head, male genitalia and other diagnostic morphological features are illustrated. The genus Agyrius St?l, 1863 and A. watanabeorum Ishikawa, 2002 are new records to China and Vietnam. This is the northernmost distributional record of the genus and the species.

Detection of Grass Carp Hemorrhage Virus (GCHV) from Vietnam and Comparison with GCHV Strain from China

Grass carp plays an important role in small-scale aquaculture in Vietnam. However, a severe disease, known in Vietnam as "Red Spot Disease", is causing significant economic loss in grass carp aquaculture. In this study, the tissue samples isolated from the grass carp with Red Spot Disease in Vietnam are investigated and comparied with the control GCHV isolated in China by experimental infection, culture cell infection, serological cross reactivity, and RT-PCR amplification. Infected grass carp exhibits hemorrhage symptoms about 5 days after experimental injection with GCHV-V (Vietnam) strain. The symptoms and lethality induced by the GCHV-V strain are identical to that induced by the Chinese GCHV-9014 strain. The Chinese GCHV-873 strain induces typical cytopathogenic effects in 4 cell lines, such as CIK, CAB, FHM and GCO, from the 6 fish cell lines examined. No cytopathogenic effects are observed in all the 6 examined cell lines, including CAB, FHM, CIK, EPC, CCO and GCO, infected by the GCHV-V strain and GCHV-9014 strain. Immunodiffusion assays demonstrate an obvious cross-reactivity among three GCHV strains. Precipitin lines are clearly observed not only between the anti-GCHV-873 serum and the two strains GCHV-873 and GCHV-9014, but also between the anti-GCHV-873 serum and the GCHV-V strain. GCHV can be detected by immunodiffusion assays after three generations of blind propagations in the cell lines inoculated by GCHV-V strain. This implicates that GCHV-V viruses have been replicated and amplified despite there being no cytopathogenic effects observed in these examined cell lines. Three genome segments of GCHV, including S8, S9 and S10, are amplified by three sets of PCR primers designed according to the segment sequences published recently. The Q8fp and Q8rp primer set specific for genome segment S8 amplifies a 955 bp fragment from the extracted sample of diseased fish with Red Spot Disease, and the fragment size is identical to that amplified by the same primer set from control GCHV-873 strain. Simultaneously, the Q9fp and Q9rp primer set specific for genome segment S9 generates a same 635 bp product, and the Q10fp and Q10rp primer set specific for genome segment S10 produces a same 697 bp fragment from both template samples of diseased fish with Red Spot Disease and control GCHV-873 strain. The RT-PCR amplification and corresponding size comparison data indicate that the three GCHV-V genome segments extracted from the diseased grass carp with Red Spot Disease in Vietnam should be identical to that in control GCHV-873 strain from China. The data confirm that the causative agent of grass carp Red Spot Disease in Vietnam is a virus, and the virus is closely similar to GCHV strain in China.

Some new country records of five species of Glenea Newman(Coleoptera:Cerambycidae:Lamiinae:Saperdini) from the Oriental Region

New country records for five species of Glenea Newman from the Oriental Region are reported. G. changchini Lin ＆ Lin, 2011 is newly recorded from Vietnam; G. rondoni Breuning, 1963 is new from Thailand; G. subregularis Pic, 1943 is new from Laos; G subviridescens Breuning, 1963 is new from China, Vietnam and Thailand; and G. viridescens Pic, 1927 is newly recorded from China and Laos. Photos of types and voucher specimens from new localities are presented.

MOTIVATION OF CHINESE INVESTMENT IN VIETNAM

China attracted a record of US$52.7× 10^9 in foreign direct investment （FDI） in the year 2002, surpassing the United States to become the world＇s largest FDI recipient. China＇s success in attracting FDI has received significant attention from academics. Several theoretical approaches have been developed to explain the determinants of FDI in China. However, it seems to be ignored that China has also become a growing provider of significant FDI to the rest of the world. According to United Nations Conference on Trade and Developlnent （UNCTAD）＇s 2004 report, as a developing country, replacing Japan, China has made the list of the expected top five home countries worldwide for the first time in terms of geographical coverage （2004-2005）. Vietnam is second largest market and another emerging transition tiger in Southeast Asia. Both China and Vietnam were and are experiencing transitions from centrally planned economy to free market economy. This paper, therefore, attempts to explore the development of Chinese investment in Vietnam, analysing the main motives for, and characteristics of, Chinese Multinational Enterprises＇ （MNEs） investment in Vietnam.

The best way of bilateral special economic zone to Sino-Vietnam economic cooperation

The Bilateral Special Economic Zones is a new idea about economic co-operation ways. It is going to be set by both countries with a common boundary for promoting the economic co-operation between two sides. It can be firstly set along the boundary between China and Vietnam. It will promote the economic co-operation between them, but China and ASEAN. It can be set along the Chinese boundary with the neighboring countries and will promote the economic co-operation between the both sides for setting up a better environment around China.

Small-Scale Household Biogas Digesters as a Viable Option for Energy Recovery and Global Warming Mitigation--Vietnam Case Study

Biogas from livestock waste is considered as clean and renewable energy in Vietnam. In the last 20 years, in rural and remote areas of Vietnam, there has been a significant increase of small-scale household biogas digesters. Biogas digesters create the benefits of replacing energy and mitigation of climate change caused by greenhouse gas （GHG） emission and deforestation for firewood and charcoal. Livestock waste produces approximately 85 million tonnes every year and continues to increase, meaning there are huge feedstocks for biogas digesters to meet the energy demands in households. However, there are also many constraints on the development programme for small-scale household biogas digester. In Vietnam, the socio-economic situation and the lack of a sustainable energy policy for biogas from livestock sector are hindering the growth of the biogas digester industry. Government subsidies are needed to encourage farmers to participate. This paper will be helpful not only for the sustainable development of household biogas in Vietnam, but also for the developing program of biogas generation in developing countries with similar agricultural economies to Vietnam.