#include <algorithm>
#include <array>
#include <functional>
#include <iostream>
#include <vector>
using namespace std;
using ll = long long;
int calc2(int i, int j) { return i + j + 2 > 4 ? 4 : i + j + 2; }
int calc1(int i, int j) { return i + j + 1 > 4 ? 4 : i + j + 1; }
// #define debug
const int maxt = 4 + 1;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(0);
    int t;
    cin >> t;
    while (t--)
        []() {
            int n;
            cin >> n;
            auto a = vector(n + 1, 0);
            auto t = vector(n + 1, 0);
            for (int i = 1; i <= n; i++)
                cin >> a[i];
            for (int i = 1; i <= n; i++)
                cin >> t[i];
            // auto dp = vector(n + 1, array<array<array<ll, 2>, 2>, maxt>{}); // 第四个维度表示 是否已经选择到了那个一去不回的点
            // auto buf = array<array<array<ll, 2>, 2>, maxt>{};
            auto dp = vector(n + 1, 0ll);
            auto edge = vector(n + 1, vector(0, 0));
            for (int i = 1; i < n; i++) {
                int u, v;
                cin >> u >> v;
                edge[u].push_back(v);
                edge[v].push_back(u);
            }
            function<void(int, int)> dfs = [&](int cur, int pre) {
                // dp[cur][0][1][1] = dp[cur][0][0][1] = 0; // arrive there and don't go to any node of subtree
                int Max = 0;
                ll sum = 0;
                for (int nxt : edge[cur]) {
                    if (nxt == pre)
                        continue;
                    dfs(nxt, cur);
                    Max = max(Max, a[nxt]);
                    dp[cur] += dp[nxt];
                    sum += dp[nxt];
                }
                dp[cur] += Max; // 走子节点 只走其中一个
                auto pMax = vector(edge[cur].size() + 2, -__LONG_LONG_MAX__), sMax = pMax, psum = pMax, ssum = pMax, id = pMax;
                int j = 0;
                for (int i = 1; i <= edge[cur].size(); i++) {
                    int nxt = edge[cur][i - 1];
                    if (nxt == pre)
                        continue;
                    ++j;
                    id[j] = nxt;
                    psum[j] = psum[j - 1] + dp[nxt];
                    pMax[j] = max(pMax[j - 1], a[nxt] - dp[nxt]);
                }
                for (; j; --j) {
                    int nxt = id[j];
                    ssum[j] = ssum[j + 1] + dp[nxt];
                    sMax[j] = max(sMax[j + 1], a[nxt] - dp[nxt]);
                }
                for (j = 1; j <= edge[cur].size() - 1; j++) {
                    int nxt = id[j];
                    if (t[nxt] == 3)
                        dp[cur] = max(dp[cur], sum + max(pMax[j - 1], sMax[j + 1] + a[nxt]));
                }
            };
            dfs(1, 0);
            cout << dp[1] + a[1] << '\n';
            // cout<<max(dp[1][])
        }();
}