Where to?

"You have to be kidding me," Liu Hui Ying was speechless beyond belief, how can she even make such a mistake? She turned to look at Grandma Lan Fen who raised her hands in the air and then said,  " This is not my fault, I did not do anything …he was the one who came inside the tent when I summoned the space." 

Liu Hui Ying turned to look at the man with a glare in her eyes and when Zhai Tianyu saw her glaring, he raised his hands as well, " I did nothing wrong —— this tent belongs to me—-ack." 

While he was speaking, he suddenly felt someone chop him in the back of his neck, a bit surprised he turned to look at the person who was behind him. 

" You…." And when he saw that the one who smacked him in the back of his neck was none other than Li Gang, he was stunned to the point where his eyes ended up rolling in their sockets on their own. 

How come a ghost was able to touch him? Much less hit him?