CRAC Class A (2025) — Questions 91–100
Unofficial study reference only. Not affiliated with the FCC, NCVEC or CRAC — official sources prevail. 非官方学习参考，与 FCC、NCVEC、CRAC 无隶属关系；以官方发布为准。
U0090. Regarding China's amateur radio station district numbers, the provinces with district number 3 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为3的省（自治区、 直辖市）为：
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District 3 includes Tianjin (A), Inner Mongolia (B), Hebei (C), and Shanxi (D). All four are correct.
U0091. Regarding China's amateur radio station district numbers, the provinces with district number 4 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为4的省（自治区、 直辖市）为：
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District 4 covers Shanghai (A), Shandong (B), and Jiangsu (C). Hainan belongs to district 7, so D is wrong.
U0092. Regarding China's amateur radio station district numbers, the provinces with district number 5 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为5的省（自治区、 直辖市）为：
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District 5 covers Zhejiang (A), Jiangxi (B), and Fujian (C). Guangxi is district 6, so D is wrong.
U0093. Regarding China's amateur radio station district numbers, the provinces with district number 6 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为6的省（自治区、 直辖市）为：
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District 6 covers Anhui (A), Henan (B), and Hubei (C). Sichuan is district 8, so D is wrong.
U0094. Regarding China's amateur radio station district numbers, the provinces with district number 7 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为7的省（自治区、 直辖市）为：
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District 7 covers Hunan (A), Guangdong (B), Guangxi (C), and Hainan (D). All four are correct — this is the large South China district.
U0095. Regarding China's amateur radio station district numbers, the provinces with district number 8 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为8的省（自治区、 直辖市）为：
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District 8 covers Sichuan (A), Chongqing (B), Guizhou (C), and Yunnan (D). All four are correct — the Southwest district.
U0096. Regarding China's amateur radio station district numbers, the provinces with district number 9 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为9的省（自治区、 直辖市）为：
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District 9 covers Shaanxi (A), Gansu (B), Ningxia (C), and Qinghai (D) — the Northwest district. All four are correct.
U0097. Regarding China's amateur radio station district numbers, the provinces with district number 0 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为0的省（自治区、 直辖市）为：
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District 0 covers the far West: Xinjiang (A) and Tibet (B). Shanghai is district 4 and Chongqing is district 8, so C and D are wrong. 业余无线电台的法定设置与使用 Lawful Establishment and Operation of Stations
U0098. The necessary step for lawfully establishing and operating an amateur radio station is:
合法设置、使用业余电台的必要步骤是：
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The lawful path is to apply to the radio management authority under the Measures and obtain a radio station license (A). Joining an association, association approval, or employer/neighborhood approval are not the legal requirement (B, C, D wrong).
U0099. The statutory purpose of an amateur radio station is:
业余无线电台的法定用途为：
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By law an amateur radio station is for intercommunication, technical research, and self-training (A) — the ITU definition of the amateur service. Personal, entertainment, or vehicle-safety use (B, C, D) is not its statutory purpose.