According to your description of the problem, it is now the foreign debt of the subsidiary, and the subsidiary should bear the responsibility of paying off the debt independently. As a shareholder of a subsidiary, if the parent company has actually paid 5 million yuan to the subsidiary, the debt of the parent company to the subsidiary need not be borne by other assets of the parent company. If the parent company fails to actually pay or fully pay the registered capital of 5 million yuan to the subsidiary, the parent company shall assume supplementary responsibilities for the debts that the subsidiary cannot pay off within the scope of unpaid principal and interest.
Regarding your question about whether the shareholders of the parent company have the obligation to repay the debts of the subsidiaries, since the shareholders of the parent company have actually paid the registered capital of RMB 6,543.8+0,000 yuan to the company, there is no need to take responsibility for the debts of the company with the property of other shareholders. Therefore, even if the parent company fails to pay its capital contribution to the subsidiary or fails to pay its capital contribution in full, the shareholders of the parent company need not be solely responsible for the debts of the subsidiary.
The above legal opinions are for your reference.