#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair <int,int>
#define endl '\n'
const int N = 2e6 + 10;
const ll mod=1e9+7;
vector <vector<int> > a;
int r,c;
char s[N];
int ck[N];
int p[N];
int find(int x){
    if(x!=p[x]){
        p[x]=find(p[x]);
    }
    return p[x];
}
ll qsm(ll a,ll b){
    ll res=1;
    while(b){
        if(b&1)res=res*a%mod;
        a=a*a%mod;
        b>>=1;
    }
    return res;
}
void U(int a,int b){
    if(a!=b){
        p[a]=b;
    }
}
void solve() {
    cin >> r >> c;
    a.clear();
    for(int i=1;i<=2*r;i++){
        ck[i]=0;
        p[i]=i;
    }
    a.resize(r+1);
    for (int i = 1;i <= r;++i) {
        cin >> s;
        a[i].resize(c+1);
        for (int j = 0;j < c;++j) {
            a[i][j+1] = s[j] - '0';
        }
    }
    for(int i=1;i<=c;i++){
        int cnt=0;
        for(int j=1;j<=r;j++){
            if(a[j][i]==1)cnt++;
            if(c-i+1!=i&&a[j][c-i+1]==1)cnt++;
        }
        if(c%2 &&i==c/2+1&&cnt>=2){
            cout<<0<<endl;
            return;
        }
        if(cnt>2){
            cout<<0<<endl;
            return;
        }
    }
    for(int i=1;i<=c;i++){
        if(a[1][i]==1){
            ck[i]=1;
        }
    }
    for(int i=2;i<=r;i++){
        for(int j=1;j<=c;j++){
            int x=j,y=c-j+1;
            if(a[i][j]&&ck[y]){
                int pd1=ck[y];
                int px=find(i),py=find(pd1);
                int px1=find(i+r),py1=find(pd1+r);

                if(px==py1||py==px1){
                    cout<<0<<endl;
                    return;
                }

                U(px,py);
                U(px+r,py+r);
            }else if(a[i][j]&&ck[j]){
                int pd1=ck[j];
                int px=find(i),py=find(pd1);
                int px1=find(i+r),py1=find(pd1+r);

                if(px==px1||py==py1){
                    cout<<0<<endl;
                    return;
                }

                U(px,py+r);
                U(py,px+r);
            }
            if(a[i][j])ck[j]=i;
        }
    }
    int cnt=0;
    for(int i=1;i<=2*r;i++){
        int pi=find(i);
        if(pi==i)cnt++;
    }
    cnt/=2;
    cout<<qsm(2,cnt)<<endl;
}
signed main() {
    ios::sync_with_stdio(false);
    int T;cin >> T;
    while (T--) solve(); 
    return 0;
}