Chinatown is the second Prototype 2 Red Zone sub-area you will have to investigate in order to get all collectibles in the game.
Five of them are Blackboxes, usually located on top of the buildings, while four of them are secret Field Ops.
If you collect all Prototype 2 Chinatown Blackboxes you will unlock new defensive mutation for James Heller.
An additional defensive mutation becomes available for killing all Chinatown Field Ops.
After you complete these two tasks, you can continue the games main-missions, or you can play other side-missions (also known as Prototype 2 Blacknet missions).
If you wish to continue your search and locate all collectibles in the Prototype 2, you should head north, towards Midtown.
Below is a Prototype 2 guide, which reveals the location of each Chinatown collectible, included in the game.
The guide provides the exact map coordinates for the points you have to locate in Chinatown, to get these collectibles.
Chinatown Blackboxes Coordinates
Blackbox #14 417, 437
Blackbox #15 457, 536
Blackbox #16 634, 510
Blackbox #17 724, 460
Blackbox #18 730, 534
Chinatown Field Ops Coordinates
Field Op #5 459, 426
Field Op #6 618, 438
Field Op #7 750, 425
Field Op #8 573, 559