People who saw the sign could text in their favorite locations and they would be displayed on the electronic signpost.
看到标志的人们可以输入他们最喜欢的地方，它们就会被显示在电子指向标中。
2
Applying a efficient Fair Electronicsign exchanging protocol. It is useful for people to exchange their signature.
设计了高效的公平电子合同签名交换协议，有利于签名交换的顺利完成。
3
People who saw the sign could text in their favourite locations and they would be displayed on the electronic signpost and the arrow would turn into the direction of the location.