Why can't the second software library be used?

You can use it.

Shenzhen Xiaoer Software Technology Co., Ltd. was established on October 26th, 20 18. The legal representative is You Zhaobang, and the business scope of the company includes: software development; Website design; Advertising design; Operating e-commerce; Computer technical services; Information consultation (excluding restricted items); Web design; Engaged in advertising business; Sales of computer software and auxiliary equipment, electronic products and communication equipment; Sales of building materials, machinery and equipment, hardware products, furniture, household appliances and lamps; Domestic service, etc.