SOURCE

// this L.CRS.Baidu from https://github.com/muyao1987/leaflet-tileLayer-baidugaode/blob/master/src/tileLayer.baidu.js

if (L.Proj) {
    L.CRS.Baidu = new L.Proj.CRS('EPSG:900913', '+proj=merc +a=6378206 +b=6356584.314245179 +lat_ts=0.0 +lon_0=0.0 +x_0=0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs', {
        resolutions: function () {
            var level = 19
            var res = [];
            res[0] = Math.pow(2, 18);
            for (var i = 1; i < level; i++) {
                res[i] = Math.pow(2, (18 - i))
            }
            return res;
        }(),
        origin: [0, 0],
        bounds: L.bounds([20037508.342789244, 0], [0, 20037508.342789244])
    });
}

L.TileLayer.ChinaProvider = L.TileLayer.extend({

    initialize: function(type, options) { // (type, Object)
        var providers = L.TileLayer.ChinaProvider.providers;

        options = options || {}

        var parts = type.split('.');

        var providerName = parts[0];
        var mapName = parts[1];
        var mapType = parts[2];

        var url = providers[providerName][mapName][mapType];
        options.subdomains = providers[providerName].Subdomains;
        options.key = options.key || providers[providerName].key;

        if ('tms' in providers[providerName]) {
            options.tms = providers[providerName]['tms']
        }

        L.TileLayer.prototype.initialize.call(this, url, options);
    }
});

L.TileLayer.ChinaProvider.providers = {
    TianDiTu: {
        Normal: {
            Map: "//t{s}.tianditu.com/DataServer?T=vec_w&X={x}&Y={y}&L={z}&tk={key}",
            Annotion: "//t{s}.tianditu.com/DataServer?T=cva_w&X={x}&Y={y}&L={z}&tk={key}"
        },
        Satellite: {
            Map: "//t{s}.tianditu.com/DataServer?T=img_w&X={x}&Y={y}&L={z}&tk={key}",
            Annotion: "//t{s}.tianditu.com/DataServer?T=cia_w&X={x}&Y={y}&L={z}&tk={key}"
        },
        Terrain: {
            Map: "//t{s}.tianditu.com/DataServer?T=ter_w&X={x}&Y={y}&L={z}&tk={key}",
            Annotion: "//t{s}.tianditu.com/DataServer?T=cta_w&X={x}&Y={y}&L={z}&tk={key}"
        },
        Subdomains: ['0', '1', '2', '3', '4', '5', '6', '7'],
        key: "071a7a55ea1daa3e9ea329cf37731475"
    },

    GaoDe: {
        Normal: {
            Map: '//webrd0{s}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}'
        },
        Satellite: {
            Map: '//webst0{s}.is.autonavi.com/appmaptile?style=6&x={x}&y={y}&z={z}',
            Annotion: '//webst0{s}.is.autonavi.com/appmaptile?style=8&x={x}&y={y}&z={z}'
        },
        Subdomains: ["1", "2", "3", "4"]
    },

    Google: {
        Normal: {
            Map: "//www.google.cn/maps/vt?lyrs=m@189&gl=cn&x={x}&y={y}&z={z}"
        },
        Satellite: {
            Map: "//www.google.cn/maps/vt?lyrs=s@189&gl=cn&x={x}&y={y}&z={z}",
            Annotion: "//www.google.cn/maps/vt?lyrs=y@189&gl=cn&x={x}&y={y}&z={z}"
        },
        Subdomains: []
    },

    Geoq: {
        Normal: {
            Map: "//map.geoq.cn/ArcGIS/rest/services/ChinaOnlineCommunity/MapServer/tile/{z}/{y}/{x}",
            PurplishBlue: "//map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}",
            Gray: "//map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetGray/MapServer/tile/{z}/{y}/{x}",
            Warm: "//map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetWarm/MapServer/tile/{z}/{y}/{x}",
        },
        Theme: {
            Hydro: "//thematic.geoq.cn/arcgis/rest/services/ThematicMaps/WorldHydroMap/MapServer/tile/{z}/{y}/{x}"
        },
        Subdomains: []
    },

    OSM: {
        Normal: {
            Map: "//{s}.tile.osm.org/{z}/{x}/{y}.png",
        },
        Subdomains: ['a', 'b', 'c']
    },

    Baidu: {
        Normal: {
            Map: '//online{s}.map.bdimg.com/onlinelabel/?qt=tile&x={x}&y={y}&z={z}&styles=pl&scaler=1&p=1'
        },
        Satellite: {
            Map: '//shangetu{s}.map.bdimg.com/it/u=x={x};y={y};z={z};v=009;type=sate&fm=46',
            Annotion: '//online{s}.map.bdimg.com/tile/?qt=tile&x={x}&y={y}&z={z}&styles=sl&v=020'
        },
        Subdomains: '0123456789',
        tms: true
    } 

};

// 高德地图
/*
L.tileLayer.chinaProvider = function(type, options) {
    return new L.TileLayer.ChinaProvider(type, options);
};

var normalm = L.tileLayer.chinaProvider('GaoDe.Normal.Map', {
    maxZoom: 18,
    minZoom: 5
});
var imgm = L.tileLayer.chinaProvider('GaoDe.Satellite.Map', {
    maxZoom: 18,
    minZoom: 5
});
var imga = L.tileLayer.chinaProvider('GaoDe.Satellite.Annotion', {
    maxZoom: 18,
    minZoom: 5
});

var normal = L.layerGroup([normalm]),
    image = L.layerGroup([imgm, imga]);

var baseLayers = {
    "地图": normal,
    "影像": image,
}

var map = L.map("map", {
    center: [31.59, 120.29],
    zoom: 12,
    layers: [normal],
    zoomControl: false
});

L.control.layers(baseLayers, null).addTo(map);
L.control.zoom({
    zoomInTitle: '放大',
    zoomOutTitle: '缩小'
}).addTo(map);
*/

// 天地图

L.tileLayer.chinaProvider = function(type, options) {
    return new L.TileLayer.ChinaProvider(type, options);
};
var normalm = L.tileLayer.chinaProvider('TianDiTu.Normal.Map', {
        maxZoom: 18,
        minZoom: 5
    }),
    normala = L.tileLayer.chinaProvider('TianDiTu.Normal.Annotion', {
        maxZoom: 18,
        minZoom: 5
    }),
    imgm = L.tileLayer.chinaProvider('TianDiTu.Satellite.Map', {
        maxZoom: 18,
        minZoom: 5
    }),
    imga = L.tileLayer.chinaProvider('TianDiTu.Satellite.Annotion', {
        maxZoom: 18,
        minZoom: 5
    });

var normal = L.layerGroup([normalm, normala]),
    image = L.layerGroup([imgm, imga]);

var baseLayers = {
    "地图": normal,
    "影像": image,
}

var overlayLayers = {

}

var map = L.map("map", {
    center: [39, 111],
    zoom: 4,
    layers: [normal],
    zoomControl: false,
    // 隐藏右下角Leaflet
    attributionControl: true
});

L.control.layers(baseLayers, overlayLayers).addTo(map);
L.control.zoom({
    zoomInTitle: '放大',
    zoomOutTitle: '缩小'
}).addTo(map);

<div id="map"></div>

body{
    margin: 0;
    padding: 0;
}
#map{
    width: 100%;
    height: 100vh;
}