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Mathematical breakthrough
1, Jiang

2, grams of square meters

3. 1 10- alarm

1 17- tell the time

12 1- weather forecast

122- Traffic accident alarm

120- rescue

1 19- fire alarm

160- artificial information service

1 14- road traffic accident alarm

122- Telephone Information Desk

184- Postal Code Inquiry

1 12- telephone drum barrier

123 15: consumer complaint hotline.

170: inquiry of communication cost,

189: communication service consultation telephone,

180: Telephone number for complaints about communication service quality.