Here is an helpful checklist, so you can check as you go (source):
GTA Chinatown Wars Checklist Main Missions [ ] Yu Jian [ ] Pursuit Farce [ ] Under the Gun [ ] Payback [ ] The Wheelman [ ] Tricks of the Triad [ ] Natural Burn Killer [ ] Recruitment Drive [ ] Carpe 'Dime' [ ] Store Wars [ ] Copter Carnage [ ] Kenny Strikes Back [ ] Missed the Boat? [ ] Rat Race [ ] Pimp His Ride [ ] Whack the Racers [ ] Jackin' Chan [ ] Raw Deal [ ] Sa-boat-age [ ] Counterfeit Gangster [ ] Slaying with Fire [ ] Clear the Pier [ ] Stealing the Show [ ] Flatliner [ ] Bomb Disposal [ ] Driven to Destruction [ ] Cash and Burn [ ] Dragon Haul Z [ ] The Fandom Menace [ ] So Near, Yet Sonar [ ] Hit from the Tong [ ] Trail Blazer [ ] The Offshore Offload [ ] One Shot, One Kill [ ] By Myriads of Swords [ ] A Shadow of Doubt [ ] Friend or Foe? [ ] Arms Out of Harm's Way [ ] The Wages of Hsin [ ] A Rude Awakening [ ] The Tow Job [ ] The Tail Bagging the Dogs [ ] Weapon of Mass Distraction [ ] Street of Rage [ ] Operation Northwood [ ] Torpedo Run [ ] Scrambled [ ] Evidence Dash [ ] Wi-Find [ ] Salt in the Wound [ ] Double Trouble [ ] Faster Pusher Man! Sell! Sell! [ ] Convoy Conflict [ ] See No Evil [ ] Grave Situation [ ] Steal the Wheels [ ] The World's a Stooge [ ] Oversights Percentage ?.??% Random Pedestrians [ ] Wilhelm [ ] Wilhelm 2 [ ] Wilhelm 3 [ ] Guy [ ] Selma 1 [ ] Selma 2 [ ] Giorgio 1 [ ] Giorgio 2 [ ] Tommy 1 [ ] Tommy 2 [ ] Marcy 1 [ ] Marcy 2 [ ] Cherie [ ] Alonso Percentage ?.??% Earn 85 Medals Note: Any medal is good enough See the Reward Section at the bottom for Gold Medal rewards Odd Jobs [ ] Police Missions Complete 5 levels (100% kill rate) [ ] Ambulance Missions Complete 5 waves (100% save rate) [ ] Firetruck Missions Gold Medal [ ] Taxi Missions Complete 15 Fares [ ] Fast Tracks [ ] HoboTron [ ] Noodle Run Algonquin [ ] Noodle Run Dukes [ ] Excess Delivery Alpha Mail [ ] Excess Delivery Liberty State Delivery [ ] Most Tattoos in a row Percentage ?.??% Time Trials [ ] Go-Kar-TT Course 1 [ ] Go-Kar-TT Course 2 [ ] Go-Kar-TT Course 3 [ ] Go-Kar-TT Course 4 [ ] Boulevard Boogie TT Course 1 [ ] Boulevard Boogie TT Course 2 [ ] Boulevard Boogie TT Course 3 [ ] Boulevard Boogie TT Course 4 [ ] Wetscapade TT Course 1 [ ] Wetscapade TT Course 2 [ ] Wetscapade TT Course 3 [ ] Wetscapade TT Course 4 [ ] Patriot Park TT Course 1 [ ] Patriot Park TT Course 2 [ ] Patriot Park TT Course 3 [ ] Patriot Park TT Course 4 [ ] Dukes Dust Up TT Course 1 [ ] Dukes Dust Up TT Course 2 [ ] Dukes Dust Up TT Course 3 [ ] Loose Exchange [ ] Midtown Mayhem [ ] East Side Escapade [ ] Graveyard Groove [ ] Beach Blitz [ ] Monument Mania [ ] Bohan Snake Percentage ?.??% Street Races S&M Grand Slam [ ] Bohan Classic [ ] Bohan Rally Transfender Invitational [ ] Algonquin Auto-trial [ ] Star Junction Circuit [ ] Middle Park Motivator Hi-Way Tire Tourney [ ] Schlotter Sweep [ ] Broker Open [ ] Dukes Dynamo Percentage ?.??% L.C. Gun Club [ ] Pistol Medal [ ] SMG Medal [ ] Shotgun Medal [ ] Grenade Medal [ ] Sniper Medal Percentage ?.??% Riding Shotgun [ ] Industrial [ ] Willis [ ] Beechwood City [ ] Purgatory [ ] Suffolk Percentage ?.??% Rampages [ ] East Island City Twin Pistols [ ] Steinway Flame thrower [ ] Northern Gardens Flame thrower [ ] Northwood Assault Rifle [ ] Happiness Island minigun [ ] Castle Gardens Carbine Rifle [ ] Northwood Chainsaw [ ] The Meat Quarter RPG [ ] Northwood Carbine Rifle [ ] Lancaster Flame thrower [ ] Hatton Gardens Assault Rifle [ ] South Bohan Flame thrower [ ] Westminster Stubby shotgun [ ] Middle Park Shotgun [ ] Meadows Park Double barreled shotgun [ ] Meadow Hills Micro SMG [ ] Boulevard unarmed [ ] Willis SMG [ ] Beechwood City Flame thrower [ ] Firefly Projects Minigun [ ] Firefly Island Twin pistols [ ] Outlook Park Micro SMG [ ] Colony Island Double barreled shotgun [ ] Middle Park West Flame thrower [ ] Beechwood City Chainsaw [ ] Castle Garden City Carbine Rifle [ ] Star Junction Sword [ ] Lower Easton Flame thrower [ ] South Bohan Stubby shotgun [ ] Fishmarket South Assault Rifle Percentage ?.??% Misc. Collectibles Security Cameras [ ] 1 [ ] 2 [ ] 3 [ ] 4 [ ] 5 [ ] 6 [ ] 7 [ ] 8 [ ] 9 [ ] 10 [ ] 11 [ ] 12 [ ] 13 [ ] 14 [ ] 15 [ ] 16 [ ] 17 [ ] 18 [ ] 19 [ ] 20 [ ] 21 [ ] 22 [ ] 23 [ ] 24 [ ] 25 [ ] 26 [ ] 27 [ ] 28 [ ] 29 [ ] 30 [ ] 31 [ ] 32 [ ] 33 [ ] 34 [ ] 35 [ ] 36 [ ] 37 [ ] 38 [ ] 39 [ ] 40 [ ] 41 [ ] 42 [ ] 43 [ ] 44 [ ] 45 [ ] 46 [ ] 47 [ ] 48 [ ] 49 [ ] 50 [ ] 51 [ ] 52 [ ] 53 [ ] 54 [ ] 55 [ ] 56 [ ] 57 [ ] 58 [ ] 59 [ ] 60 [ ] 61 [ ] 62 [ ] 63 [ ] 64 [ ] 65 [ ] 66 [ ] 67 [ ] 68 [ ] 69 [ ] 70 [ ] 71 [ ] 72 [ ] 73 [ ] 74 [ ] 75 [ ] 76 [ ] 77 [ ] 78 [ ] 79 [ ] 80 [ ] 81 [ ] 82 [ ] 83 [ ] 84 [ ] 85 [ ] 86 [ ] 87 [ ] 88 [ ] 89 [ ] 90 [ ] 91 [ ] 92 [ ] 93 [ ] 94 [ ] 95 [ ] 96 [ ] 97 [ ] 98 [ ] 99 [ ] 100 Percentage: ?.??% Unique Stunt Jumps (USJs) [ ] 1 [ ] 2 [ ] 3 [ ] 4 [ ] 5 [ ] 6 [ ] 7 [ ] 8 [ ] 9 [ ] 10 [ ] 11 [ ] 12 [ ] 13 [ ] 14 [ ] 15 [ ] 16 [ ] 17 [ ] 18 [ ] 19 [ ] 20 [ ] 21 [ ] 22 [ ] 23 [ ] 24 [ ] 25 [ ] 26 [ ] 27 [ ] 28 [ ]29 [ ] 30 Percentage: ?.??% Safehouses [ ] 1 [ ] 2 [ ] 3 [ ] 4 [ ] 5 [ ] 6 [ ] 7 [ ] 8 [ ] 9 [ ] 10 [ ] 11 [ ] 12 [ ] 13 [ ] 14 [ ] 15 [ ] 16 [ ] 17 [ ] 18 [ ] 19 [ ] 20 [ ] 21 Percentage: ?.??% Meet All Drug Dealers [ ] 1 [ ] 2 [ ] 3 [ ] 4 [ ] 5 [ ] 6 [ ] 7 [ ] 8 [ ] 9 [ ] 10 [ ] 11 [ ] 12 [ ] 13 [ ] 14 [ ] 15 [ ] 16 [ ] 17 [ ] 18 [ ] 19 [ ] 20 [ ] 21 [ ] 22 [ ] 23 [ ] 24 [ ] 25 [ ] 26 [ ] 27 [ ] 28 [ ] 29 [ ] 30 [ ] 31 [ ] 32 [ ] 33 [ ] 34 [ ] 35 [ ] 36 [ ] 37 [ ] 38 [ ] 39 [ ] 40 [ ] 41 [ ] 42 [ ] 43 [ ] 44 [ ] 45 [ ] 46 [ ] 47 [ ] 48 [ ] 49 [ ] 50 [ ] 51 [ ] 52 [ ] 53 [ ] 54 [ ] 55 [ ] 56 [ ] 57 [ ] 58 [ ] 59 [ ] 60 [ ] 61 [ ] 62 [ ] 63 [ ] 64 [ ] 65 [ ] 66 [ ] 67 [ ] 68 [ ] 69 [ ] 70 [ ] 71 [ ] 72 [ ] 73 [ ] 74 [ ] 75 [ ] 76 [ ] 77 [ ] 78 [ ] 79 [ ] 80 Note: You do not have to buy or sell. Just open the screen with the bag/trunk. Percentage: ?.??% Drug Warehouse Raid Complete 1 Percentage ?.??% Golden Dragons [ ] 1 [ ] 2 Percentage: ?.??% REWARDS Ambulance Missions Infinite Sprint Police Missions Double Body Armor Firetruck Missions Fireproof Taxi Missions All Bulletproof Taxis L.C. Gun Club (5 medals) Ammu-Nation Discount Noodle Run (2 medals) Regenerating Health Excess Delivery (2 medals) Expanded Drug Storage Drug Trading Trophy How To Earn Wooden Spoon Lose $500 Platinum Syringe Purchase Heroin Diamond Pillbox Sell hallucinogenics Jeweled Bong Sell depressants Silver Safe Make $2,000 Golden Binoculars Find 40 dealers Titanium Briefcase Find 80 dealers Jeweled Key to the City Own all 21 Safehouses