A-share bull stocks surged by 100% in just 6 days; the Chaoshan tycoon’s net worth jumped by 4 billion; the worst bull stock in A-shares plunged 80% in one week.

Reporter | Lin Fengzhi, Trainee Reporter Lin Qianwei

Editor | Li Yanna Jiang Peixia

This week, all three major A-share indexes saw cumulative gains that were negative. The SSE Composite Index fell 0.86%, the Shenzhen Component Index fell 2.96%, and the ChiNext Index fell 4.44%. Individual stocks with gains over the week accounted for 20%; 175 stocks rose by more than 10%, and 494 stocks fell by more than 10%.

Top 20 A-share “bull stocks” for the week: 13 came from the biopharmaceutical sector, with the hottest stock up 90%

Excluding stocks listed this year, 11 stocks rose by more than 30% over the week. Among the top 20 “bull stocks” by weekly gain this week, 13 came from the biopharmaceutical sector, with weekly gains all exceeding 27%. By sub-industry, chemical pharmaceuticals had 5 stocks, pharmaceutical distribution had 3, medical devices had 2, and there was 1 each in biological products, healthcare services, and traditional Chinese medicine. Among them, Haitai Xinguang (688677.SH) and Jinzhou Pharmaceutical (600488.SH) led the pack, rising 75.26% and 60.97%, respectively.

Chaoshan listed companies bring in an autonomous-driving unicorn; this week’s top stock price doubles in 6 days

The best performer, Xinghui Huancai, surged 100% in 6 days. Among them, three trading days—March 31, April 1, and April 2—each saw 20CM daily limit-up, resulting in an overall wealth increase of about RMB 4 billion for the Chen Yansheng family.

Xinghui Huancai’s main business is the R&D, production, and sales of polymer synthetic material polystyrene (PS). Its products are widely used in fields such as electronic and electrical appliances, toys, and consumer goods packaging.

This round of sharp price gains was driven by a notice released by Xinghui Huancai on the evening of March 30 regarding changes in the rights and interests of an indirectly controlling shareholder. Xinghui Huancai stated that the company’s actual controllers Chen Yansheng, Chen Dongqiong, Chen Chuanghuang, and their concerted actor Chen Yueping signed share transfer agreements with Zelos HK and Jiangsu Jiushi, respectively. It was agreed that Chen Dongqiong would transfer 51% of the company’s shareholder Xinghui Hong Kong equity it holds to Zelos HK; and that Chen Yansheng, Chen Chuanghuang, and Chen Yueping would jointly transfer 45% of the equity in the company’s controlling shareholder Xinghui Holdings they hold in total to Jiangsu Jiushi.

On March 28, 2026, the Chen Yansheng family (the actual controller) and its concerted actor signed share transfer agreements with two wholly owned subsidiaries under Jiushi Intelligent. The total consideration is about RMB 1.18B. After the transaction is completed, Jiushi Intelligent will indirectly hold 27.49% of the equity in Xinghui Huancai, and the Chen Yansheng family will still maintain control with a 45.19% stake.

Such strong market expectations stem from the fact that Jiushi Intelligent’s investment not only brings backing from a technology capital of a “hundred-billion” scale, but also opens up imagination space for Xinghui Huancai’s transformation from traditional chemical materials to a “new materials + autonomous driving scenarios” model. Zelos HK and Jiangsu Jiushi are the two wholly owned subsidiaries of Jiushi Intelligent, an autonomous-driving company. Jiushi Intelligent was founded in 2021 and is the world’s largest RoboVan (autonomous driving van for logistics) enterprise, focusing on the R&D of artificial intelligence and L4-level autonomous driving technology.

It is reported that one of Xinghui Huancai’s actual controllers, Chen Yansheng, comes from Chaoshan in Guangdong. According to an article by Times Finance, in 1995, Chen Yansheng and his wife Chen Dongqiong founded the Xinghui Plastic Factory. They made their first big fortune by making money from toy soccer. In 2010 and 2022, Chen Yansheng’s Xinghui Entertainment (300043.SZ) and Xinghui Huancai were listed one after another, and his personal wealth grew accordingly. In 2022, he also made it onto the Hurun Global Rich List.

On April 3, Xinghui Huancai released an announcement about severe abnormal fluctuations in stock trading, stating that the company’s main raw material for its polystyrene products is styrene, which is a downstream bulk chemical product in oil refining and chemical processing. If oil prices or the supply-and-demand relationship for styrene undergo major changes leading to sharp raw material price fluctuations, the company may be unable to effectively address cost pressure through conventional cost pass-through mechanisms, resulting in a decline in the company’s gross margin.

Top 20 A-share “bear stocks” for the week: the worst performer fell 80% after resuming trading; power concept stocks led the decline

Excluding stocks listed this year, 49 stocks fell by more than 20% over the week. The worst performer, Lifang Tui (rights protection) (300344.SZ), fell by more than 80% cumulatively this week. The stock resumed trading on March 31, 2026, and entered delisting risk整理 period. On the first trading day when the stock enters the delisting整理 period, no price rise/fall limits apply; thereafter, each trading day’s rise/fall limit is 20%. The delisting整理 period lasts 15 trading days, and the expected last trading date is April 21, 2026.

The power sector, which had strengthened against the trend earlier, saw follow-on declines. Among the bear stocks in the top 20 by weekly decline this week, 7 came from the power industry, including Jinzheng Power (000767.SZ), Guangxi Energy (rights protection) (600310.SH), Ningbo Energy (600982.SH), and so on. Among them, Jinzheng Power’s decline ranked just behind the worst performer Lifang Tui, falling by more than 31%.

In addition, two stocks in the photovoltaic equipment industry entered this week’s list of the top 20 bear stocks: Sungrow Power Supply (300274.SZ) and Yunnan Technology (688348.SH).

Massive information, precise analysis—everything in the Sina Finance APP