Line chart has 6 lines at most in the WPS Office

[PengWuLin]

Description
Line chart has 6 lines at most

Steps to reproduce the issue:

1. Generate a line graph with more than six lines

Describe the results you received:

Describe the results you expected:

Output of go version:
go version go1.13.6

(paste your output here)

Excelize version or commit ID:

(paste here)

Environment details (OS, Microsoft Excel™ version, physical, etc.):
go version go1.13.6 darwin/amd64

[PengWuLin]

package main

import (
	"fmt"

	"github.com/360EntSecGroup-Skylar/excelize"
)

var s string = `{
	"type": "line",
	"series": [{
		"name": "Sheet1!$A$2",
		"categories": "",
		"values": "Sheet1!$B$2:$D$2"
	}, {
		"name": "Sheet1!$A$3",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$3:$D$3"
	}, {
		"name": "Sheet1!$A$4",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$4:$D$4"
	}, {
		"name": "Sheet1!$A$5",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$5:$D$5"
	}, {
		"name": "Sheet1!$A$6",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$6:$D$6"
	}, {
		"name": "Sheet1!$A$7",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$7:$D$7"
	}, {
		"name": "Sheet1!$A$8",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$8:$D$8"
	}, {
		"name": "Sheet1!$A$9",
		"categories": "Sheet1!$B$1:$D$1",
		"values": "Sheet1!$B$9:$D$9"
	}],

	"legend": {
		"position": "top",
		"show_legend_key": false
	},
	"title": {
		"name": "Fruit Line Chart"
	},
	"plotarea": {
		"show_bubble_size": true,
		"show_cat_name": false,
		"show_leader_lines": false,
		"show_percent": true,
		"show_series_name": true,
		"show_val": true
	},
	"show_blanks_as": "zero",
	"dimension":{
		"height":1080,
		"width":960
	}
}`

func main() {
	categories := map[string]string{
		"A2": "Small", "A3": "Normal", "A4": "Large",
		"A5": "A5", "A6": "A6", "A7": "A7",
		"A8": "A8", "A9": "A9",
		"B1": "Apple", "C1": "Orange", "D1": "Pear"}
	values := map[string]int{
		"B2": 2, "C2": 3, "D2": 3,
		"B3": 5, "C3": 2, "D3": 4,
		"B4": 6, "C4": 7, "D4": 8,
		"B5": 9, "C5": 10, "D5": 11,
		"B6": 12, "C6": 13, "D6": 14,
		"B7": 15, "C7": 16, "D7": 17,
		"B8": 18, "C8": 19, "D8": 20,
		"B9": 21, "C9": 22, "D9": 23}
	f := excelize.NewFile()
	for k, v := range categories {
		f.SetCellValue("Sheet1", k, v)
	}
	for k, v := range values {
		f.SetCellValue("Sheet1", k, v)
	}
	if err := f.AddChart("Sheet1", "E1", s); err != nil {
		fmt.Println(err)
	}
	// save
	if err := f.SaveAs("./Book1.xlsx"); err != nil {
		fmt.Println(err)
	}
}

[xuri]

Thanks for your feedback. I have tested on Microsoft® Excel 16.36, OpenOffice™ 4.1.7, Libre Office 6.3.3.2, and it works well. Maybe I need some time to investigate the issue that working in the Kingsoft WPS Office.