Li heads to Pakistan on May 22 and will be the first foreign dignitary to meet PML-N chief Sharif after his election victory.
"To develop friendly ties with Pakistan is a set policy of successive governments of China. Likewise to develop friendly policy with China is the cornerstone of Pakistan's foreign policy," Chinese Vice Foreign Minister Song Tao said, adding no matter who comes to power in Islamabad the all weather bilateral ties will continue.
Li will set out on his first foreign tour on May 19, visiting India first for three days followed by Pakistan, Switzerland and Germany.
"No matter how the international and regional landscapes and situation within our two countries evolve, relations between our two countries will be further consolidated," Song said.
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The fact that Li's visit is taking place right after elections in Pakistan is full indication of high degree of mutual trust and special friendship between the two countries, Song said.
He will deliver a speech on bilateral relations and meet people who contributed to China-Pakistan friendship, Song said.
To develop and grow a strategic partnership cooperation between China and Pakistan not only serves the fundamental interests of the two countries and peoples but also contributes to regional and international peace, stability and development, he said.