Hello Sharon, you should receive your visa very soon if you are leaving for your holiday in 4 weeks time. It will not be late or forgotten.
As for the executive lounge, you are welcome to take any hand luggage in with you, even if it is a sports bag. I would however recommend that you not wear trainers. You do not need to dress formally, as long as it is smart casual, which basically means avoid things like trainers, jeans and t-shirts.
I hope this information has been helpful and if you have any further queries then please do not hesitate to contact me. Have a wonderful time in China!
Kind regards
James, your editor