Captain America wants YOU to find and report on the threat of HYDRA's infiltration of Hong Kong. Once you locate their evil graffiti mark in the alley, turn on your Geosense superpowers to infiltrate their nearby secret base! Beware the HYDRA agents who inhabit this location during daylight hours. They are suspicious and will take notice of anyone snooping around!! The base may appear empty at night, but beware the secret guardians - rodents of unusually large size and robotic cockroaches abide here in plentiful numbers! Enter their secret base at your own risk!
All joking aside, this street sweeper depot in the middle of the alley is indeed inhabited by extremely suspicious street sweepers by day and lots of creepy crawlies at night. A few meters from the HYDRA graffiti are a couple storage/rest huts for the street sweepers. The cache is NOT on any of the huts so please do not search there. No need to fear that your fingers will be bitten by the evil minions of Hydra. But if any street sweeper are outside when you approach, DO NOT make a show of searching. Trust me, there is absolutely no reason that you could give any of the street sweepers as to why you're searching for something in their territory. So just don't search if anyone is outside, period. They will watch you and Hydra will win!