I need to travel from Shenzhen to Hong Kong by rail on Tuesday 2 June evening.

I have found the information that I need to use the East Rail Line, that it runs every 7 - 15 minutes, that the journey time is 1h30. I thought that there was a direct line but have failed to find any way of buying a simple one-way ticket from Shenzhen to HK.

Other information I have gathered from multiple sources suggest I have to change trains at the border with mainland China. From above I gather that the HK section goes from Lo Wu to Central HK (Kowloon Tong??) where I can change to the Kwun Tong Line to go further.

By crossing several pieces of information I understand that I need to take the Luobao Line in Shenzhen to Luohu where I walk through customs over a bridge and to the Lo Wu station (and onto Kowloon as above)

Please tell me if I have got this right. I have not found a simple description of the whole trip anywhere

Thanks

Tim Baker