He was replying to media queries relating to trade friction between China and the US.
Last month, US President Donald Trump imposed $200 billion tariff on Chinese imports. China retaliated by imposing tariffs on about $60 billion of US imports.
Washington threatened to impose additional tariffs of over $260 billion on Chinese imports if China retaliates again.
"Under the current circumstances, China and India need to deepen their cooperation to fight trade protectionism," Ji said.
He said China and India share common interests in defending the multilateral trading system and free trade and referred to comments by President Xi Jinping and Prime Minister Narendra Modi to safeguard the multilateral trading system and free trade at the World Economic Forum in Davos.
"Facing unilateralism and bullying activities, China and India have more reasons to join efforts to build a more just and reasonable international order," Ji said.
The Chinese Embassy spokesperson also said the US should reflect on its own practice of interfering in the internal affairs of developing countries such as China and India under the pretext of human rights and religious matters.
"The so-called 'militarisation' of South China Sea by China is distorting of facts. The US should stop making troubles and creating tensions, and respect the efforts of relevant parties to resolve problems through negotiation and consultation," Ji said.
Referring to the Indo-Pacific region, the spokesperson said China was firmly against attempts to use the so-called Indo-Pacific strategy as a tool to counter China.
At the same time, Ji said, Beijing was open to all initiatives that will help regional development and cooperation.
"The allegation that China has put some developing countries into 'debt trap' is nothing but an attempt to sow discord," Ji said.
He said China's economic cooperation with other developing countries is to ensure win-win situation and common development.
"China is open to all initiatives that will help regional development and cooperation. What we are firmly against is attempts to use the so-called Indo-Pacific strategy as a tool to counter China
He said China was looking forward to the US taking concrete steps to become a trusted partner of the developing countries.