Unit detail updates

resources/units/unit_info_text.json

@@ -813,6 +813,13 @@
             "manufacturer": "Sukhoi",
             "role": "Multirole Fighter",
             "year-of-variant-introduction": "1996"
+        },
+        "China": {
+            "name": "Su-30MKK Flanker-G",
+            "country-of-origin": "USSR/Russia",
+            "manufacturer": "Sukhoi",
+            "role": "Multirole Fighter",
+            "year-of-variant-introduction": "2000"
         }
     }],
     "Su-33": [{
@@ -821,8 +828,15 @@
             "text": "The Su-33 has been the backbone of Russian aircraft carrier aviation since the late 1990s and is an all-weather fighter capable of engaging both air and surface targets. Based on the powerful Su-27 \"Flanker\", the Su-33 is a navalized version suited for operations aboard the Admiral Kuznetsov aircraft carrier. Changes to the Su-33 include strengthened landing gear, folding wings, more powerful engines, and the very visible canards.\n\nThe Su-33 is equipped with a powerful pulse doppler radar and an Infrared Search and Track (IRST) for engaging aerial targets with a wide range of radar- and infrared-guided missiles and its internal cannon. For air-to-surface attack, the Su-33 can be armed with many types of unguided bombs, rockets, and cluster munitions.\n\nDespite its large size, the Su-33 is very capable in a dogfight when combined with its integral helmet-mounted sight and off-boresight missiles.",
             "country-of-origin": "USSR/Russia",
             "manufacturer": "Sukhoi",
-            "role": "Multirole Fighter",
+            "role": "Carrier-based Multirole Fighter",
             "year-of-variant-introduction": "1998"
+        },
+        "China": {
+            "name": "J-15 Flanker X-2",
+            "country-of-origin": "China",
+            "manufacturer": "Shenyang",
+            "role": "Carrier-based Multirole Fighter",
+            "year-of-variant-introduction": "2013"
         }
     }],
     "Su-34": [{