各位朋友，本人想求助一下

就是说，本人想做一个mod（根据之前做的大清炮兵mod改的），让欧美国家可以加强他们的长炮，已经学会了写卡片的效果，但是呢，如何把卡片添加进主城的卡组却始终搞不明白，一出来卡还是在北京。跪求哪位朋友不吝赐教，感激不尽。
附上之前写的代码：
<homecitymods>
  <cards>
  <card>
    <name>WhitworthCannon</name>
    <maxcount>1</maxcount>
    <level>10</level>
    <age>3</age>
    <!-- <displayunitcount>2</displayunitcount> -->
  </card>
</cards>
<building>
  <name>ArtilleryFoundry</name>
  <obtainabletechs>
    <tech x="7.8" y="7">WhitworthCannon</tech>
  </obtainabletechs>
  <activetechs>
    <tech x="7.8" y="7">WhitworthCannon</tech>
  </activetechs>
</building>
</homecitymods>
还有这些：
<techtreemods>
	<tech name="WhitworthCannon" type="Normal">
		<dbid>4657</dbid>
		<displaynameid>999987</displaynameid>
		<cost resourcetype="Ships">1.0000</cost>
		<researchpoints>40.0000</researchpoints>
				<cost resourcetype="Gold">1000</cost>
		<status>UNOBTAINABLE</status>
		<icon>resources\art\units\asians\chinese\hand_mortar\hand_mortar_icon_64.png</icon>
		<rollovertextid>999986</rollovertextid>
		<flag>HomeCity</flag>
		<effects>
			<Effect type ="Data" amount ="6.1" subtype ="DamageBonus" unittype ="Building" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
			<Effect type ="Data" amount ="1" subtype ="DamageBonus" unittype ="AbstractArtillery" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
						<Effect type ="Data" amount ="3" subtype ="DamageBonus" unittype ="AbstractInfantry" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
						<Effect type ="Data" amount ="1.5" subtype ="DamageBonus" unittype ="AbstractCavalry" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
						<Effect type ="Data" amount ="1.5" subtype ="DamageBonus" unittype ="AbstractLightInfantry" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
						<Effect type ="Data" amount ="2" subtype ="DamageBonus" unittype ="Guardian" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
						<Effect type ="Data" amount ="1" subtype ="DamageBonus" unittype ="AbstractVillager" allactions ="1" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
			<Effect type ="Data" amount ="2" subtype ="DamageArea" action ="CannonAttack" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
			<Effect type ="Data" amount ="200" subtype ="Cost" resource ="Gold" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
			<Effect type ="Data" amount ="200" subtype ="Cost" resource ="Wood" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>       
						<Effect type ="Data" amount ="3" subtype ="populationcount" relativity ="absolute">
				<Target type ="ProtoUnit">ypCulverin</Target></Effect>
		</effects>
	  </tech>	 
</techtreemods>

不太明白你说的“把卡片添加进主城的卡组”是什么？是默认卡组还是让卡片在主城显示，因为我直接拿了你的语句，在游戏中是没有任何显示的(因为你提到了北京，我默认当你是修改中国卡片，homecitychinese.mods.xml这个文件)
如果是让卡片在主城显示
你需要修正homecitychinese.mods.xml语句中的ArtilleryFoundry，将其改成Fortress
<building>  <name>Fortress</name>
  <!--<name>ArtilleryFoundry</name>-->
  <obtainabletechs>
    <tech x="7.8" y="7">WhitworthCannon</tech>
  </obtainabletechs>
  <activetechs>
    <tech x="7.8" y="7">WhitworthCannon</tech>
  </activetechs>
</building>

<name></name>不能乱填，要与原来的homecity文件名称一直