{"ticker": {"uuid": "f46ea40d-ddd2-4b67-a9ad-18687e6976c6", "symbol": "301449", "name": "Shenzhen Tiansu Calibration and Testing Co., Ltd.", "exchange": "SHZ", "asset_type": "equity"}, "latest_week": "2026-06-12", "summary": "301449 closed the latest completed week at 40.10 CNY. The 4-week return is -18.5% and the 12-week return is -50.9%. Trend Signal is inactive, Market Dynamics is 0.00.", "description": "Shenzhen Tiansu Calibration and Testing Co., Ltd. provides metrology calibration, testing, certification, and professional technical services in China. The company offers product testing, product certification, high-volt and safety appliance testing, environment testing, and lab technology services. 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