To protect the tourists' rights and profits, it is necessary to get rid of the phenomena of information asymmetry and to establish information supporting institutions for tourists.
要保护旅游者权益，应消除信息不对称现象，建立对旅游者的信息支持制度。
Vulnerable group; Information supporting; Information guarantee mechanism; Knowledge Gap Theory.
弱势群体；信息援助； 信息保障机制；知识沟理论。
Vulnerable group; Information supporting; Information guarantee mechanism; Knowledge Gap Theory.
弱势群体；信息援助； 信息保障机制；知识沟理论。
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