项目/年份

2017

2018

2019

2020

2021

营业收入

240,712,301

259,664,820

278,216,017

284,221,249

341,233,208

营业成本

162,510,418

188,164,557

197,913,928

212,839,592

264,525,999

占收入比重

67.51%

72.46%

71.14%

74.89%

77.52%

销售费用

26738673

31085879

27,522,276

34,611,231

28,647,344

占收入比重

11.11%

11.97%

9.89%

12.18%

8.40%

管理费用

7,510,102

9,571,639

9,531,361

9,264,148

10,266,283

占收入比重

3.12%

3.69%

3.43%

3.26%

3.01%

研发费用

7,270,134

8377201

9,638,137

10,118,667

12,014,907

占收入比重

3.02%

3.23%

3.46%

3.56%

3.52%

税金及附加

1,416,428

1,617,566

1,720,616

1,533,646

1,609,384

占收入比重

0.59%

0.62%

0.62%

0.54%

0.47%

所得税费用

3,243,584

4,122,639

4,651,970

4,156,997

4,702,168

占收入比重

1.35%

1.59%

1.67%

1.46%

1.38%