巴林內政部：巴林響起防空警報。

Wang Kejian’s team at the China Rice Research Institute reported development of a one-line hybrid rice, Yixi No.1, achieving stable cloning efficiency above 99% and normal fertility; the study was published July 21 in the journal Vita. By contrast, China’s widespread three-line and two-line hybrid systems suffer genetic segregation and cannot be used to retain seed, forcing annual production from male-sterile and restorer lines — a process the team says is technically demanding, higher risk and typically drives hybrid seed costs to more than 10x conventional rice seed. Experts note hybrid rice has been indispensable to China’s and global food security.

7月20日，美債收益率明顯上行，10年期收益率升至4.60%附近，20年期收益率突破5.1%，市場重新開始交易長期通脹和期限溢價壓力。 此次上漲的核心並非美聯儲突然轉向鷹派，而是市場對未來通脹路徑重新定價。近期美伊衝突升級、霍爾木茲海峽運輸受限，使能源價格重新獲得風險溢價。雖然美國近期CPI、PPI數據顯示通脹有所緩和，但能源成本若持續維持高位，可能推遲去通脹進程，強化“二次通脹”擔憂。 與此同時，美聯儲進入議息會議前靜默期，市場缺少政策預期引導，債市交易更多受到油價、財政供給以及企業發債需求影響。大型企業集中發行長期債券，也可能迫使機構出售部分流動性較高的美債，進一步推升長端收益率。 對於資產市場而言，10年美債收益率重新靠近4.6%，意味着無風險收益率再次成爲估值約束。此前依賴低利率環境支撐的高估值科技股和成長資產，將面臨更高的貼現率壓力。