Why did Timur’s planned expedition against Ming China never occur?

Timur’s planned expedition against Ming China never occurred because he died in February 1405 while en route to the campaign.12

In 1404, the Turko-Mongol conqueror Timur prepared to launch a military expedition against China. Although the Yongle emperor was vaguely aware of these preparations and alerted his western commanders to be ready for potential conflict, the threat was neutralized by Timur's death at Otrar. Following his passing, the planned expedition was canceled, and the Ming dynasty subsequently maintained amicable relations with Timur’s heirs in Samarkand and Herat, which helped keep Central Asian trade routes open.21