One possible version：
Hi ，Paul，
How ie everything going？
Welcome to changchun。I’m so glad to see that you come to my city learning chines。
Since you have been here for only two days ，you may not know well about the city，especially the surroundings you live in。I will be free tomorrow，and I’d like to help you by some vegetables in the supermarket close to your apartment。Is it ok if we meet at the entrance to the supermarket？it’s just at the second crossing on the left side downstairs your apartment。By the way，it will be a little bit cold tomorrow，so don’t forget to wear some warm clothes 。what’s more ，the traffic here looks very crazy ，so make sure that you pay some more attention to the traffic。Please call me if you have any problem。
Good luck，
Li Hua
略