What route did the 524th Regt take during its withdrawal

[armybiscuits]

Hello All
I am a new member and this is my 1st post so please bear with me.
When the 524th pulled back at 10pm on October 26th what was its route of withdrawal to the Divisional HQ in the Sihang warehouse.
Did the Chinese forces keep there line of retreat to within within the Shanghai Municipality or did some units withdraw to the Divisional HQ via the foreign concessions ?
Where exactly is the boundary of the foreign concessions on North Tibet Rd?
Did the whole Regiment or what was left of it other than the 1st Battalion rwithdraw over the New Lese Bridge?
I am a keen historical wargamer and I am asking as I am currently planning a scenario based on the 800 Heroes
Cheers