pakistani prime minister nawaz sharif is working to promote economic ties with china. he is visiting beijing where he has met with top leaders. patchari raksawong in bangkok has more. >> sharif and his chinese counterpart attending a ceremony for signing a series of agreements on friday. since returning to power in june, sharif has set his eyes on building stronger relations with china. he is working with the old ally in the hope of rebuilding pakistan's economy and developing its infrastructure. sharif chose china as the destination of his first official overseas visit since taking office. pakistan and china are close allies in part because of their mutual rivalry with india. >> our friendship is higher than this and deeper than the deepest sea in the world. and sweeter than honey. >> there may be another reason behind sharif's glowing message to china. pakistan's energy shortages continue to worsen. some areas of the capital, islamabad, are without power more than ten hours a day. sharif wonover voters during his campaign by condemning the previous government for fai