Think of it as a high-wire act. Beijing is trying to regain its balance after investors dumped shares yesterday, sparking a trading halt and worldwide market woes. China reportedly had a “national team” of state-owned financial firms start buying shares again today while leaders said they’re planning to install new rules to prevent selloffs by major shareholders. This helped the CSI 300 index close slightly higher after yesterday’s 7 percent drop. But with the Shanghai Composite Index falling 0.3 percent, and the Shenzhen Composite down 1.9 percent, global markets remain jittery.