Part two summarizes the research on economy integration, the study on lancang-mekong river sub-region and tourism integration.
第二部分研究综述，对经济一体化、澜沧江-湄公河的研究和旅游一体化的相关理论进行了综述。
The rationality and inevitability of Lancang-mekong river sub-region tourism integration, its objectivity and practical significance, its urgency and stagnation;
次区域旅游一体化提出的合理性与必然性、客观性与现实性、紧迫性与滞后性；
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