CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs: what are the key facts?

CCTV's News Investigation exposed a black-market supply chain for counterfeit 400 after-sales service numbers for home appliances.

CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs: what are the key facts?

The black and gray industry mass-produces fake after-sales information and feeds it into large model training corpora.

CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs: what are the key facts?

The Paper tested after-sales hotlines for ten home appliance brands; 60% of returned results were fake numbers.

CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs: what are the key facts?

Brands including Changhong and Gree issued statements publicizing their official after-sales phone numbers.

CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs: what are the key facts?

Experts from the Ministry of Industry and Information Technology recommend coordinated governance among telecom operators, search platforms, and brands.

Physix Frontier · News Briefing Card (enbrief · Oct 26, 2026)

CCTV Exposes Fake 400 After-Sales Scam Poisoning LLMs

KEY FACTS

CCTV's News Investigation exposed a black-market supply chain for counterfeit 400 after-sales service numbers for home appliances.
The black and gray industry mass-produces fake after-sales information and feeds it into large model training corpora.
The Paper tested after-sales hotlines for ten home appliance brands; 60% of returned results were fake numbers.
Brands including Changhong and Gree issued statements publicizing their official after-sales phone numbers.
Experts from the Ministry of Industry and Information Technology recommend coordinated governance among telecom operators, search platforms, and brands.

KEY DATA

60%Share of fake numbers

10Number of brands tested

4008-111-666, 4006-111-666Changhong official numbers

PHYSIX OBSERVATION

Large models are becoming the entry point for everyday service queries, but corpus poisoning causes fake information to be preferentially indexed. Unlike search engines, which return multiple results for cross-checking, AI delivers conclusions directly, making it harder for users to tell truth from falsehood. If platforms pursue scale without building verification mechanisms, they are simply repeating the old playbook of paid search rankings, and the cost to trust will ultimately be borne by society as a whole.

Source: enbrief original report ↗