１９９０年：认识旅游事业，发展旅游事业 (Tourism: an unrecognized industry, a service to be released)("the hague declaration on tourism") 

    １９９１年：通信、信息和教育：旅游发展的动力 (Communication, information and education: powerlines oftourism development) 

    １９９２年：旅游促进社会经济一体化，是各国人民相互了解的途径 (Tourism: a factor of growing social and economic solidarityand of encounter between people)

    １９９３年：争取旅游发展和环境保护的和谐 (Tourism development and environmental protection: towards alasting harmony) 
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