the tile type is vec_w
CRS is default

// tile
    L.TileLayer.TdtLayer = L.TileLayer.extend({
        getTileUrl: function (coords) {
            var layerType = "w"
            return "http://t0.tianditu.cn/" +
                "vec_" + layerType +
                "/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=vec&STYLE=default&" +
                "TILEMATRIXSET=" + layerType + "&FORMAT=tiles&TILECOL=" +
                coords.x + "&TILEROW=" +
                coords.y + "&TILEMATRIX=" + coords.z;
        }
    });
    
    L.tileLayer.tdtLayer = function (options) {
        return new L.TileLayer.TdtLayer(null, options)
    }
    
    var map = L.map("map", {
        center: [
            31.90059,
            120.584663
        ],
        zoom: 1
    });
    
    var tdtTile = L.tileLayer.tdtLayer({
        layerType: "vec",
        tms: true
    });
    
     map.addLayer(tdtTile);

    map.on("click", function (e) {
        console.log(e.latlng)
    })

are all normal

2:

vec_c
CRS

3:

vec_c
CRSL.CRS.EPSG4326

the bosses passing by help to see how to solve this problem, and the map disorder problem in case 3 can be fixed.