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A portable cooking system comprising a base tray, a grill plate, a lid, and a reflector is provided. The base tray comprises a heating through hole and a basin provided at a bottom of the base tray. The grill plate comprises a central opening, a substantially annular surface, and a plurality of drai

A portable cooking system comprising a base tray, a grill plate, a lid, and a reflector is provided. The base tray comprises a heating through hole and a basin provided at a bottom of the base tray. The grill plate comprises a central opening, a substantially annular surface, and a plurality of drain holes in the annular surface. The reflector of an upturned bowl shape comprises a reflecting bump, radial furrows, and radial ridges alternatively disposed between the radial furrows, and the reflector is attached to a ceiling of the lid. Some of the radial furrows and the radial ridges are disposed on an inner surface of the upturned bowl shape, such that the heating airflow that rise upward through the heating through hole and hit a center portion of the reflector are guided outwardly to reach evenly over to the grill plate.

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1. A portable cooking system, comprising: a grill plate comprising a central opening, a substantially annular surface, and a plurality of drain holes in the annular surface;a lid to cover the grill plate; anda reflector of an upturned bowl shape, comprising a plurality of furrows, and a plurality of

1. A portable cooking system, comprising: a grill plate comprising a central opening, a substantially annular surface, and a plurality of drain holes in the annular surface;a lid to cover the grill plate; anda reflector of an upturned bowl shape, comprising a plurality of furrows, and a plurality of ridges alternatively disposed between the furrows, wherein the reflector is attached to a ceiling portion of the lid, wherein the furrows and ridges are radially formed along an inner surface of the upturned bowl shape, anda base tray comprising a heating through hole and a basin, the basin being provided at a bottom of the base tray and around the heating through hole, wherein the heating through hole is adapted for guiding heating airflow therethrough, and wherein the basin is adapted to collect liquid falling down, wherein the grill plate is configured to sit on the base tray,wherein the cross-sectional profile of the upturned bowl shape has a locally lowest point at a center of the profile, rises as the distance from the center increases toward a highest point of the profile, and falls to a lowest point at an edge of the profile. 2. The portable cooking system of claim 1, wherein the reflector comprises a cross-sectional profile configured to deliver the heating airflow evenly to the annular surface of the grill plate. 3. The portable cooking system of claim 1, wherein the cross-sectional profile of the upturned bowl shape has one or more fluctuations with locally minimum or maximum points. 4. The portable cooking system of claim 3, wherein each of the one or more fluctuations with the locally minimum or maximum points is configured to deliver the heating airflow to a different portion of the annular surface of the grill plate. 5. The portable cooking system of claim 1, wherein the plurality of furrows and ridges comprise a plurality of whirlwind patterns. 6. The portable cooking system of claim 5, wherein the plurality of ridges are distributed evenly around the center of the reflector. 7. The portable cooking system of claim 1, wherein the lid comprises a metal body and a glass cover disposed on a top hole of the metal body. 8. The portable cooking system of claim 7, wherein the lid further comprises a fastening ring for fixing the glass cover in the top hole. 9. The portable cooking system of claim 8, wherein the reflector is attached to the lid with a mechanical fastener, and wherein the mechanical fastener comprises: a top fastening hole provided in a center of the glass cover;a bottom fastening hole provided in the center of the reflector;a supporting plate configured to cover a portion of the glass cover and comprising an elliptical hole;an elliptical nut configured to be installed in the elliptical hole; anda bolt configured to engage the elliptical nut through the top and bottom fastening holes. 10. The portable cooking system of claim 1, further comprising a handle, wherein the handle extends from a side portion of the lid toward a center of the lid, and wherein a supporting portion of the handle is aligned with a side portion of the lid, such that the lid stands substantially vertically on the supporting portion of the handle and the side portion of the lid. 11. The portable cooking system of claim 10, wherein the handle further comprises a fixing member for attaching the handle to the side portion of the lid, a gripping portion extending toward the center of the lid, and a mechanical fastener for connecting the fixing member and the gripping portion. 12. The portable cooking system of claim 1, wherein the drain holes of the grill plate are disposed concentrically and substantially evenly along an axial direction. 13. The portable cooking system of claim 12, wherein the drain holes are configured to drop liquid on the grill plate down to the basin. 14. The portable cooking system of claim 1, wherein the base tray comprises a plurality of ventilation holes in outer side walls. 15. The portable cooking system of claim 14, wherein the base tray further comprises a plurality of auxiliary holes disposed between the basin and the heating through hole. 16. The portable cooking system of claim 15, wherein the plurality of ventilation holes are disposed substantially vertically, and wherein the plurality of auxiliary holes are disposed substantially horizontally. 17. The portable cooking system of claim 1, wherein the heating through hole is fitted into the central opening of the grill plate. 18. The portable cooking system of claim 1, wherein the reflector is circumferentially toothed to form outward peaks and inward troughs, wherein the outward peaks correspond to the ridges and the inward troughs correspond to the furrows.